IA² RDF/HTML vocabulary
type: Ontology
description: A dated, mechanically generated vocabulary for current HTML elements, attributes, syntax kinds, content categories, and DOM structure in RDF.
issued: 2026-07-18
conforms to: elements-3
conforms to: attributes-3
conforms to: element-content-categories
conforms to: elements-2
conforms to: html.spec.whatwg.org
source snapshot: SourceSnapshot
  type: source snapshot
  source: elements-3
source snapshot: SourceSnapshot
  type: source snapshot
  source: attributes-3
source snapshot: SourceSnapshot
  type: source snapshot
  source: element-content-categories
source snapshot: SourceSnapshot
  type: source snapshot
  source: elements-2
source snapshot: SourceSnapshot
  type: source snapshot
  source: html.spec.whatwg.org
version info: 0.1 (2026-07-18 HTML Living Standard snapshot)

source snapshot
type: Class

HTML content category
type: Class

conditional category membership
type: Class

DOM node
type: Class

HTML document
type: Class
subclass of: DOM node
subclass of: TotalOrdering

document type
type: Class
subclass of: DOM node
subclass of: Comparable

text node
type: Class
subclass of: DOM node
subclass of: Comparable

comment node
type: Class
subclass of: DOM node
subclass of: Comparable

HTML element
type: Class
subclass of: DOM node
subclass of: Comparable
subclass of: TotalOrdering

ForeignElement
type: Class
subclass of: HTML element
source: foreign-elements
comment: MathML and SVG namespace elements are a syntax kind recorded for provenance; generated named element classes cover only the HTML namespace.

custom or future element
type: Class
subclass of: HTML element

HTML attribute occurrence
type: Class

indexed HTML attribute definition
type: Class

HTML attribute applicability and value context
type: Class

has child
type: ObjectProperty
domain: DOM node
range: DOM node
inverse of: child of
property chain axiom: immediatelyPrecedes
property chain axiom: precedes
comment: Associates a document or element with a direct child. Strict-precedence closure derives the remaining children in the same sibling ordering; immediate precedence additionally asserts adjacency.

child of
type: ObjectProperty
sub property of: inOrdering
domain: DOM node
range: DOM node
comment: Inverse of rdfhtml:hasChild and a specialization of ordering-context membership.

ordered children
type: ObjectProperty
domain: DOM node
range: List
comment: Links a document or element to one complete RDF list of its direct children. Processors normalize the list to child membership and immediate precedence before validation.

document base IRI
type: ObjectProperty
domain: HTML document

node data
type: DatatypeProperty
domain: DOM node
range: string

metadata content
type: Class
type: HTML content category
source: metadata-content-2

flow content
type: Class
type: HTML content category
source: flow-content-2

sectioning content
type: Class
type: HTML content category
source: sectioning-content-2

heading content
type: Class
type: HTML content category
source: heading-content-2

phrasing content
type: Class
type: HTML content category
source: phrasing-content-2

embedded content
type: Class
type: HTML content category
source: embedded-content-category

interactive content
type: Class
type: HTML content category
source: interactive-content-2

form-associated elements
type: Class
type: HTML content category
source: form-associated-element

listed elements
type: Class
type: HTML content category
source: category-listed

submittable elements
type: Class
type: HTML content category
source: category-submit

resettable elements
type: Class
type: HTML content category
source: category-reset

autocapitalize-and-autocorrect inheriting elements
type: Class
type: HTML content category
source: category-autocapitalize

labelable elements
type: Class
type: HTML content category
source: category-label

palpable content
type: Class
type: HTML content category
source: palpable-content-2

script-supporting elements
type: Class
type: HTML content category
source: script-supporting-elements-2

a element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: a
snapshot date: 2026-07-18
source: the-a-element
source: normal-elements

abbr element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: abbr
snapshot date: 2026-07-18
source: the-abbr-element
source: normal-elements

address element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: address
snapshot date: 2026-07-18
source: the-address-element
source: normal-elements

area element
type: Class
subclass of: VoidElement
tag name: area
snapshot date: 2026-07-18
source: the-area-element
source: void-elements

article element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: sectioning content
subclass of: palpable content
tag name: article
snapshot date: 2026-07-18
source: the-article-element
source: normal-elements

aside element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: sectioning content
subclass of: palpable content
tag name: aside
snapshot date: 2026-07-18
source: the-aside-element
source: normal-elements

audio element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
tag name: audio
snapshot date: 2026-07-18
source: the-audio-element
source: normal-elements

b element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: b
snapshot date: 2026-07-18
source: the-b-element
source: normal-elements

base element
type: Class
subclass of: VoidElement
subclass of: metadata content
tag name: base
snapshot date: 2026-07-18
source: the-base-element
source: void-elements

bdi element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: bdi
snapshot date: 2026-07-18
source: the-bdi-element
source: normal-elements

bdo element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: bdo
snapshot date: 2026-07-18
source: the-bdo-element
source: normal-elements

blockquote element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: blockquote
snapshot date: 2026-07-18
source: the-blockquote-element
source: normal-elements

body element
type: Class
subclass of: NormalElement
tag name: body
snapshot date: 2026-07-18
source: the-body-element
source: normal-elements

br element
type: Class
subclass of: VoidElement
subclass of: flow content
subclass of: phrasing content
tag name: br
snapshot date: 2026-07-18
source: the-br-element
source: void-elements

button element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: interactive content
subclass of: form-associated elements
subclass of: listed elements
subclass of: submittable elements
subclass of: autocapitalize-and-autocorrect inheriting elements
subclass of: labelable elements
subclass of: palpable content
tag name: button
snapshot date: 2026-07-18
source: the-button-element
source: normal-elements

canvas element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
subclass of: palpable content
tag name: canvas
snapshot date: 2026-07-18
source: the-canvas-element
source: normal-elements

caption element
type: Class
subclass of: NormalElement
tag name: caption
snapshot date: 2026-07-18
source: the-caption-element
source: normal-elements

cite element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: cite
snapshot date: 2026-07-18
source: the-cite-element
source: normal-elements

code element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: code
snapshot date: 2026-07-18
source: the-code-element
source: normal-elements

col element
type: Class
subclass of: VoidElement
tag name: col
snapshot date: 2026-07-18
source: the-col-element
source: void-elements

colgroup element
type: Class
subclass of: NormalElement
tag name: colgroup
snapshot date: 2026-07-18
source: the-colgroup-element
source: normal-elements

data element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: data
snapshot date: 2026-07-18
source: the-data-element
source: normal-elements

datalist element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
tag name: datalist
snapshot date: 2026-07-18
source: the-datalist-element
source: normal-elements

dd element
type: Class
subclass of: NormalElement
tag name: dd
snapshot date: 2026-07-18
source: the-dd-element
source: normal-elements

del element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: del
snapshot date: 2026-07-18
source: the-del-element
source: normal-elements

details element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: interactive content
subclass of: palpable content
tag name: details
snapshot date: 2026-07-18
source: the-details-element
source: normal-elements

dfn element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: dfn
snapshot date: 2026-07-18
source: the-dfn-element
source: normal-elements

dialog element
type: Class
subclass of: NormalElement
subclass of: flow content
tag name: dialog
snapshot date: 2026-07-18
source: the-dialog-element
source: normal-elements

div element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: div
snapshot date: 2026-07-18
source: the-div-element
source: normal-elements

dl element
type: Class
subclass of: NormalElement
subclass of: flow content
tag name: dl
snapshot date: 2026-07-18
source: the-dl-element
source: normal-elements

dt element
type: Class
subclass of: NormalElement
tag name: dt
snapshot date: 2026-07-18
source: the-dt-element
source: normal-elements

em element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: em
snapshot date: 2026-07-18
source: the-em-element
source: normal-elements

embed element
type: Class
subclass of: VoidElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
subclass of: interactive content
subclass of: palpable content
tag name: embed
snapshot date: 2026-07-18
source: the-embed-element
source: void-elements

fieldset element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: form-associated elements
subclass of: listed elements
subclass of: autocapitalize-and-autocorrect inheriting elements
subclass of: palpable content
tag name: fieldset
snapshot date: 2026-07-18
source: the-fieldset-element
source: normal-elements

figcaption element
type: Class
subclass of: NormalElement
tag name: figcaption
snapshot date: 2026-07-18
source: the-figcaption-element
source: normal-elements

figure element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: figure
snapshot date: 2026-07-18
source: the-figure-element
source: normal-elements

footer element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: footer
snapshot date: 2026-07-18
source: the-footer-element
source: normal-elements

form element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: form
snapshot date: 2026-07-18
source: the-form-element
source: normal-elements

h1 element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: heading content
subclass of: palpable content
tag name: h1
snapshot date: 2026-07-18
source: the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
source: normal-elements

h2 element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: heading content
subclass of: palpable content
tag name: h2
snapshot date: 2026-07-18
source: the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
source: normal-elements

h3 element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: heading content
subclass of: palpable content
tag name: h3
snapshot date: 2026-07-18
source: the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
source: normal-elements

h4 element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: heading content
subclass of: palpable content
tag name: h4
snapshot date: 2026-07-18
source: the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
source: normal-elements

h5 element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: heading content
subclass of: palpable content
tag name: h5
snapshot date: 2026-07-18
source: the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
source: normal-elements

h6 element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: heading content
subclass of: palpable content
tag name: h6
snapshot date: 2026-07-18
source: the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
source: normal-elements

head element
type: Class
subclass of: NormalElement
tag name: head
snapshot date: 2026-07-18
source: the-head-element
source: normal-elements

header element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: header
snapshot date: 2026-07-18
source: the-header-element
source: normal-elements

hgroup element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: heading content
subclass of: palpable content
tag name: hgroup
snapshot date: 2026-07-18
source: the-hgroup-element
source: normal-elements

hr element
type: Class
subclass of: VoidElement
subclass of: flow content
tag name: hr
snapshot date: 2026-07-18
source: the-hr-element
source: void-elements

html element
type: Class
subclass of: NormalElement
tag name: html
snapshot date: 2026-07-18
source: the-html-element
source: normal-elements

i element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: i
snapshot date: 2026-07-18
source: the-i-element
source: normal-elements

iframe element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
subclass of: interactive content
subclass of: palpable content
tag name: iframe
snapshot date: 2026-07-18
source: the-iframe-element
source: normal-elements

img element
type: Class
subclass of: VoidElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
subclass of: form-associated elements
subclass of: palpable content
tag name: img
snapshot date: 2026-07-18
source: the-img-element
source: void-elements

input element
type: Class
subclass of: VoidElement
subclass of: flow content
subclass of: phrasing content
subclass of: form-associated elements
subclass of: listed elements
subclass of: submittable elements
subclass of: resettable elements
subclass of: autocapitalize-and-autocorrect inheriting elements
subclass of: labelable elements
tag name: input
snapshot date: 2026-07-18
source: the-input-element
source: void-elements

ins element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: ins
snapshot date: 2026-07-18
source: the-ins-element
source: normal-elements

kbd element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: kbd
snapshot date: 2026-07-18
source: the-kbd-element
source: normal-elements

label element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: interactive content
subclass of: form-associated elements
subclass of: palpable content
tag name: label
snapshot date: 2026-07-18
source: the-label-element
source: normal-elements

legend element
type: Class
subclass of: NormalElement
tag name: legend
snapshot date: 2026-07-18
source: the-legend-element
source: normal-elements

li element
type: Class
subclass of: NormalElement
tag name: li
snapshot date: 2026-07-18
source: the-li-element
source: normal-elements

link element
type: Class
subclass of: VoidElement
subclass of: metadata content
tag name: link
snapshot date: 2026-07-18
source: the-link-element
source: void-elements

main element
type: Class
subclass of: NormalElement
subclass of: palpable content
tag name: main
snapshot date: 2026-07-18
source: the-main-element
source: normal-elements

map element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: map
snapshot date: 2026-07-18
source: the-map-element
source: normal-elements

mark element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: mark
snapshot date: 2026-07-18
source: the-mark-element
source: normal-elements

menu element
type: Class
subclass of: NormalElement
subclass of: flow content
tag name: menu
snapshot date: 2026-07-18
source: the-menu-element
source: normal-elements

meta element
type: Class
subclass of: VoidElement
subclass of: metadata content
tag name: meta
snapshot date: 2026-07-18
source: the-meta-element
source: void-elements

meter element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: labelable elements
subclass of: palpable content
tag name: meter
snapshot date: 2026-07-18
source: the-meter-element
source: normal-elements

nav element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: sectioning content
subclass of: palpable content
tag name: nav
snapshot date: 2026-07-18
source: the-nav-element
source: normal-elements

noscript element
type: Class
subclass of: NormalElement
subclass of: metadata content
subclass of: flow content
subclass of: phrasing content
tag name: noscript
snapshot date: 2026-07-18
source: the-noscript-element
source: normal-elements

object element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
subclass of: form-associated elements
subclass of: listed elements
subclass of: palpable content
tag name: object
snapshot date: 2026-07-18
source: the-object-element
source: normal-elements

ol element
type: Class
subclass of: NormalElement
subclass of: flow content
tag name: ol
snapshot date: 2026-07-18
source: the-ol-element
source: normal-elements

optgroup element
type: Class
subclass of: NormalElement
tag name: optgroup
snapshot date: 2026-07-18
source: the-optgroup-element
source: normal-elements

option element
type: Class
subclass of: NormalElement
tag name: option
snapshot date: 2026-07-18
source: the-option-element
source: normal-elements

output element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: form-associated elements
subclass of: listed elements
subclass of: resettable elements
subclass of: autocapitalize-and-autocorrect inheriting elements
subclass of: labelable elements
subclass of: palpable content
tag name: output
snapshot date: 2026-07-18
source: the-output-element
source: normal-elements

p element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: p
snapshot date: 2026-07-18
source: the-p-element
source: normal-elements

picture element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
subclass of: palpable content
tag name: picture
snapshot date: 2026-07-18
source: the-picture-element
source: normal-elements

pre element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: pre
snapshot date: 2026-07-18
source: the-pre-element
source: normal-elements

progress element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: labelable elements
subclass of: palpable content
tag name: progress
snapshot date: 2026-07-18
source: the-progress-element
source: normal-elements

q element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: q
snapshot date: 2026-07-18
source: the-q-element
source: normal-elements

rp element
type: Class
subclass of: NormalElement
tag name: rp
snapshot date: 2026-07-18
source: the-rp-element
source: normal-elements

rt element
type: Class
subclass of: NormalElement
tag name: rt
snapshot date: 2026-07-18
source: the-rt-element
source: normal-elements

ruby element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: ruby
snapshot date: 2026-07-18
source: the-ruby-element
source: normal-elements

s element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: s
snapshot date: 2026-07-18
source: the-s-element
source: normal-elements

samp element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: samp
snapshot date: 2026-07-18
source: the-samp-element
source: normal-elements

script element
type: Class
subclass of: RawTextElement
subclass of: metadata content
subclass of: flow content
subclass of: phrasing content
subclass of: script-supporting elements
tag name: script
snapshot date: 2026-07-18
source: the-script-element
source: raw-text-elements

search element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: search
snapshot date: 2026-07-18
source: the-search-element
source: normal-elements

section element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: sectioning content
subclass of: palpable content
tag name: section
snapshot date: 2026-07-18
source: the-section-element
source: normal-elements

select element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: interactive content
subclass of: form-associated elements
subclass of: listed elements
subclass of: submittable elements
subclass of: resettable elements
subclass of: autocapitalize-and-autocorrect inheriting elements
subclass of: labelable elements
subclass of: palpable content
tag name: select
snapshot date: 2026-07-18
source: the-select-element
source: normal-elements

selectedcontent element
type: Class
subclass of: NormalElement
subclass of: phrasing content
tag name: selectedcontent
snapshot date: 2026-07-18
source: the-selectedcontent-element
source: normal-elements

slot element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
tag name: slot
snapshot date: 2026-07-18
source: the-slot-element
source: normal-elements

small element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: small
snapshot date: 2026-07-18
source: the-small-element
source: normal-elements

source element
type: Class
subclass of: VoidElement
tag name: source
snapshot date: 2026-07-18
source: the-source-element
source: void-elements

span element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: span
snapshot date: 2026-07-18
source: the-span-element
source: normal-elements

strong element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: strong
snapshot date: 2026-07-18
source: the-strong-element
source: normal-elements

style element
type: Class
subclass of: RawTextElement
subclass of: metadata content
tag name: style
snapshot date: 2026-07-18
source: the-style-element
source: raw-text-elements

sub element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: sub
snapshot date: 2026-07-18
source: the-sub-and-sup-elements
source: normal-elements

summary element
type: Class
subclass of: NormalElement
tag name: summary
snapshot date: 2026-07-18
source: the-summary-element
source: normal-elements

sup element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: sup
snapshot date: 2026-07-18
source: the-sub-and-sup-elements
source: normal-elements

table element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: palpable content
tag name: table
snapshot date: 2026-07-18
source: the-table-element
source: normal-elements

tbody element
type: Class
subclass of: NormalElement
tag name: tbody
snapshot date: 2026-07-18
source: the-tbody-element
source: normal-elements

td element
type: Class
subclass of: NormalElement
tag name: td
snapshot date: 2026-07-18
source: the-td-element
source: normal-elements

template element
type: Class
subclass of: TemplateElement
subclass of: metadata content
subclass of: flow content
subclass of: phrasing content
subclass of: script-supporting elements
tag name: template
snapshot date: 2026-07-18
source: the-template-element
source: the-template-element-2

textarea element
type: Class
subclass of: EscapableRawTextElement
subclass of: flow content
subclass of: phrasing content
subclass of: interactive content
subclass of: form-associated elements
subclass of: listed elements
subclass of: submittable elements
subclass of: resettable elements
subclass of: autocapitalize-and-autocorrect inheriting elements
subclass of: labelable elements
subclass of: palpable content
tag name: textarea
snapshot date: 2026-07-18
source: the-textarea-element
source: escapable-raw-text-elements

tfoot element
type: Class
subclass of: NormalElement
tag name: tfoot
snapshot date: 2026-07-18
source: the-tfoot-element
source: normal-elements

th element
type: Class
subclass of: NormalElement
tag name: th
snapshot date: 2026-07-18
source: the-th-element
source: normal-elements

thead element
type: Class
subclass of: NormalElement
tag name: thead
snapshot date: 2026-07-18
source: the-thead-element
source: normal-elements

time element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: time
snapshot date: 2026-07-18
source: the-time-element
source: normal-elements

title element
type: Class
subclass of: EscapableRawTextElement
subclass of: metadata content
tag name: title
snapshot date: 2026-07-18
source: the-title-element
source: escapable-raw-text-elements

tr element
type: Class
subclass of: NormalElement
tag name: tr
snapshot date: 2026-07-18
source: the-tr-element
source: normal-elements

track element
type: Class
subclass of: VoidElement
tag name: track
snapshot date: 2026-07-18
source: the-track-element
source: void-elements

u element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: u
snapshot date: 2026-07-18
source: the-u-element
source: normal-elements

ul element
type: Class
subclass of: NormalElement
subclass of: flow content
tag name: ul
snapshot date: 2026-07-18
source: the-ul-element
source: normal-elements

var element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: palpable content
tag name: var
snapshot date: 2026-07-18
source: the-var-element
source: normal-elements

video element
type: Class
subclass of: NormalElement
subclass of: flow content
subclass of: phrasing content
subclass of: embedded content
subclass of: palpable content
tag name: video
snapshot date: 2026-07-18
source: the-video-element
source: normal-elements

wbr element
type: Class
subclass of: VoidElement
subclass of: flow content
subclass of: phrasing content
tag name: wbr
snapshot date: 2026-07-18
source: the-wbr-element
source: void-elements

abbr attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: abbr
reflected idl name: abbr
attribute context: attribute-context-abbr-th
snapshot date: 2026-07-18
source: attributes-3
source: dom-th-abbr

accept attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: accept
reflected idl name: accept
attribute context: attribute-context-accept-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-accept

accept-charset attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: accept-charset
reflected idl name: acceptCharset
attribute context: attribute-context-accept-charset-form
snapshot date: 2026-07-18
source: attributes-3
source: dom-form-acceptcharset

accesskey attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: accesskey
reflected idl name: accessKey
attribute context: attribute-context-accesskey-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-accesskey

action attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: action
reflected idl name: action
attribute context: attribute-context-action-form
snapshot date: 2026-07-18
source: attributes-3
source: dom-fs-action

allow attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: allow
reflected idl name: allow
attribute context: attribute-context-allow-iframe
snapshot date: 2026-07-18
source: attributes-3
source: dom-iframe-allow

allowfullscreen attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: allowfullscreen
reflected idl name: allowFullscreen
attribute context: attribute-context-allowfullscreen-iframe
snapshot date: 2026-07-18
source: attributes-3
source: dom-iframe-allowfullscreen

alpha attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: alpha
reflected idl name: alpha
attribute context: attribute-context-alpha-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-alpha

alt attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: alt
reflected idl name: alt
attribute context: attribute-context-alt-area-img-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-area-alt
source: dom-img-alt
source: dom-input-alt

as attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: as
attribute context: attribute-context-as-link
snapshot date: 2026-07-18
source: attributes-3

async attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: async
attribute context: attribute-context-async-script
snapshot date: 2026-07-18
source: attributes-3

autocapitalize attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: autocapitalize
reflected idl name: autocapitalize
attribute context: attribute-context-autocapitalize-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-autocapitalize

autocomplete attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: autocomplete
reflected idl name: autocomplete
attribute context: attribute-context-autocomplete-form
attribute context: attribute-context-autocomplete-input-select-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-fe-autocomplete

autocorrect attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: autocorrect
attribute context: attribute-context-autocorrect-global
snapshot date: 2026-07-18
source: attributes-3

autofocus attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: autofocus
reflected idl name: autofocus
attribute context: attribute-context-autofocus-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-fe-autofocus

autoplay attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: autoplay
reflected idl name: autoplay
attribute context: attribute-context-autoplay-audio-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-media-autoplay

blocking attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: blocking
reflected idl name: blocking
attribute context: attribute-context-blocking-link-script-style
snapshot date: 2026-07-18
source: attributes-3
source: dom-link-blocking
source: dom-script-blocking
source: dom-style-blocking

charset attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: charset
attribute context: attribute-context-charset-meta
snapshot date: 2026-07-18
source: attributes-3

checked attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: checked
reflected idl name: defaultChecked
attribute context: attribute-context-checked-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-defaultchecked

cite attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: cite
reflected idl name: cite
attribute context: attribute-context-cite-blockquote-del-ins-q
snapshot date: 2026-07-18
source: attributes-3
source: dom-mod-cite
source: dom-quote-cite

class attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: class
attribute context: attribute-context-class-global
snapshot date: 2026-07-18
source: attributes-3

closedby attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: closedby
reflected idl name: closedBy
attribute context: attribute-context-closedby-dialog
snapshot date: 2026-07-18
source: attributes-3
source: dom-dialog-closedby

color attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: color
attribute context: attribute-context-color-link
snapshot date: 2026-07-18
source: attributes-3

colorspace attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: colorspace
attribute context: attribute-context-colorspace-input
snapshot date: 2026-07-18
source: attributes-3

cols attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: cols
reflected idl name: cols
attribute context: attribute-context-cols-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-textarea-cols

colspan attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: colspan
reflected idl name: colSpan
attribute context: attribute-context-colspan-td-th
snapshot date: 2026-07-18
source: attributes-3
source: dom-tdth-colspan

command attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: command
reflected idl name: command
attribute context: attribute-context-command-button
snapshot date: 2026-07-18
source: attributes-3
source: dom-button-command

commandfor attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: commandfor
attribute context: attribute-context-commandfor-button
snapshot date: 2026-07-18
source: attributes-3

content attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: content
reflected idl name: content
attribute context: attribute-context-content-meta
snapshot date: 2026-07-18
source: attributes-3
source: dom-meta-content

contenteditable attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: contenteditable
attribute context: attribute-context-contenteditable-global
snapshot date: 2026-07-18
source: attributes-3

controls attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: controls
reflected idl name: controls
attribute context: attribute-context-controls-audio-img-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-img-controls
source: dom-media-controls

coords attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: coords
reflected idl name: coords
attribute context: attribute-context-coords-area
snapshot date: 2026-07-18
source: attributes-3
source: dom-area-coords

crossorigin attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: crossorigin
attribute context: attribute-context-crossorigin-audio-img-link-script-video
snapshot date: 2026-07-18
source: attributes-3

data attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: data
reflected idl name: data
attribute context: attribute-context-data-object
snapshot date: 2026-07-18
source: attributes-3
source: dom-object-data

datetime attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: datetime
reflected idl name: dateTime
attribute context: attribute-context-datetime-del-ins
attribute context: attribute-context-datetime-time
snapshot date: 2026-07-18
source: attributes-3
source: dom-mod-datetime
source: dom-time-datetime

decoding attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: decoding
attribute context: attribute-context-decoding-img
snapshot date: 2026-07-18
source: attributes-3

default attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: default
reflected idl name: default
attribute context: attribute-context-default-track
snapshot date: 2026-07-18
source: attributes-3
source: dom-track-default

defer attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: defer
reflected idl name: defer
attribute context: attribute-context-defer-script
snapshot date: 2026-07-18
source: attributes-3
source: dom-script-defer

dir attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: dir
attribute context: attribute-context-dir-global
attribute context: attribute-context-dir-bdo
snapshot date: 2026-07-18
source: attributes-3

dirname attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: dirname
reflected idl name: dirName
attribute context: attribute-context-dirname-input-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-dirname
source: dom-textarea-dirname

disabled attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: disabled
reflected idl name: disabled
attribute context: attribute-context-disabled-button-input-optgroup-option-select-textarea-form-associated-custom-elements
attribute context: attribute-context-disabled-fieldset
attribute context: attribute-context-disabled-link
snapshot date: 2026-07-18
source: attributes-3
source: dom-button-disabled
source: dom-fe-disabled
source: dom-fieldset-disabled
source: dom-link-disabled
source: dom-optgroup-disabled
source: dom-option-disabled
source: dom-select-disabled
source: dom-textarea-disabled

download attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: download
reflected idl name: download
attribute context: attribute-context-download-a-area
snapshot date: 2026-07-18
source: attributes-3
source: dom-a-download
source: dom-area-download

draggable attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: draggable
attribute context: attribute-context-draggable-global
snapshot date: 2026-07-18
source: attributes-3

enctype attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: enctype
attribute context: attribute-context-enctype-form
snapshot date: 2026-07-18
source: attributes-3

enterkeyhint attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: enterkeyhint
attribute context: attribute-context-enterkeyhint-global
snapshot date: 2026-07-18
source: attributes-3

fetchpriority attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: fetchpriority
attribute context: attribute-context-fetchpriority-img-link-script
snapshot date: 2026-07-18
source: attributes-3

for attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: for
reflected idl name: htmlFor
attribute context: attribute-context-for-label
attribute context: attribute-context-for-output
snapshot date: 2026-07-18
source: attributes-3
source: dom-label-htmlfor
source: dom-output-htmlfor

form attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: form
attribute context: attribute-context-form-button-fieldset-input-object-output-select-textarea-form-associated-custom-elements
snapshot date: 2026-07-18
source: attributes-3

formaction attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: formaction
reflected idl name: formAction
attribute context: attribute-context-formaction-button-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-fs-formaction

formenctype attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: formenctype
attribute context: attribute-context-formenctype-button-input
snapshot date: 2026-07-18
source: attributes-3

formmethod attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: formmethod
attribute context: attribute-context-formmethod-button-input
snapshot date: 2026-07-18
source: attributes-3

formnovalidate attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: formnovalidate
reflected idl name: formNoValidate
attribute context: attribute-context-formnovalidate-button-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-button-formnovalidate
source: dom-fs-formnovalidate

formtarget attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: formtarget
reflected idl name: formTarget
attribute context: attribute-context-formtarget-button-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-button-formtarget
source: dom-fs-formtarget

headers attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: headers
reflected idl name: headers
attribute context: attribute-context-headers-td-th
snapshot date: 2026-07-18
source: attributes-3
source: dom-tdth-headers

headingoffset attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: headingoffset
reflected idl name: headingOffset
attribute context: attribute-context-headingoffset-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-headingoffset

headingreset attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: headingreset
reflected idl name: headingReset
attribute context: attribute-context-headingreset-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-headingreset

height attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: height
reflected idl name: height
attribute context: attribute-context-height-canvas-embed-iframe-img-input-object-source-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-dim-height
source: dom-embed-height
source: dom-img-height
source: dom-input-height
source: dom-object-height
source: dom-source-height
source: dom-video-height

hidden attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: hidden
attribute context: attribute-context-hidden-global
snapshot date: 2026-07-18
source: attributes-3

high attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: high
reflected idl name: high
attribute context: attribute-context-high-meter
snapshot date: 2026-07-18
source: attributes-3
source: dom-meter-high

href attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: href
reflected idl name: href
attribute context: attribute-context-href-a-area
attribute context: attribute-context-href-link
attribute context: attribute-context-href-base
snapshot date: 2026-07-18
source: attributes-3
source: dom-base-href
source: dom-hyperlink-href
source: dom-link-href

hreflang attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: hreflang
reflected idl name: hreflang
attribute context: attribute-context-hreflang-a-link
snapshot date: 2026-07-18
source: attributes-3
source: dom-a-hreflang
source: dom-link-hreflang

http-equiv attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: http-equiv
reflected idl name: httpEquiv
attribute context: attribute-context-http-equiv-meta
snapshot date: 2026-07-18
source: attributes-3
source: dom-meta-httpequiv

id attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: id
attribute context: attribute-context-id-global
snapshot date: 2026-07-18
source: attributes-3

imagesizes attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: imagesizes
reflected idl name: imageSizes
attribute context: attribute-context-imagesizes-link
snapshot date: 2026-07-18
source: attributes-3
source: dom-link-imagesizes

imagesrcset attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: imagesrcset
reflected idl name: imageSrcset
attribute context: attribute-context-imagesrcset-link
snapshot date: 2026-07-18
source: attributes-3
source: dom-link-imagesrcset

inert attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: inert
reflected idl name: inert
attribute context: attribute-context-inert-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-inert

inputmode attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: inputmode
attribute context: attribute-context-inputmode-global
snapshot date: 2026-07-18
source: attributes-3

integrity attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: integrity
reflected idl name: integrity
attribute context: attribute-context-integrity-link-script
snapshot date: 2026-07-18
source: attributes-3
source: dom-link-integrity
source: dom-script-integrity

is attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: is
attribute context: attribute-context-is-global
snapshot date: 2026-07-18
source: attributes-3

ismap attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: ismap
reflected idl name: isMap
attribute context: attribute-context-ismap-img
snapshot date: 2026-07-18
source: attributes-3
source: dom-img-ismap

itemid attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: itemid
attribute context: attribute-context-itemid-global
snapshot date: 2026-07-18
source: attributes-3

itemprop attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: itemprop
attribute context: attribute-context-itemprop-global
snapshot date: 2026-07-18
source: attributes-3

itemref attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: itemref
attribute context: attribute-context-itemref-global
snapshot date: 2026-07-18
source: attributes-3

itemscope attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: itemscope
attribute context: attribute-context-itemscope-global
snapshot date: 2026-07-18
source: attributes-3

itemtype attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: itemtype
attribute context: attribute-context-itemtype-global
snapshot date: 2026-07-18
source: attributes-3

kind attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: kind
attribute context: attribute-context-kind-track
snapshot date: 2026-07-18
source: attributes-3

label attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: label
reflected idl name: label
attribute context: attribute-context-label-optgroup-option-track
snapshot date: 2026-07-18
source: attributes-3
source: dom-optgroup-label
source: dom-option-label
source: dom-track-label

lang attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: lang
reflected idl name: lang
attribute context: attribute-context-lang-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-lang

list attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: list
attribute context: attribute-context-list-input
snapshot date: 2026-07-18
source: attributes-3

loading attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: loading
attribute context: attribute-context-loading-audio-iframe-img-video
snapshot date: 2026-07-18
source: attributes-3

loop attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: loop
reflected idl name: loop
attribute context: attribute-context-loop-audio-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-media-loop

low attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: low
reflected idl name: low
attribute context: attribute-context-low-meter
snapshot date: 2026-07-18
source: attributes-3
source: dom-meter-low

max attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: max
reflected idl name: max
attribute context: attribute-context-max-input
attribute context: attribute-context-max-meter-progress
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-max
source: dom-meter-max
source: dom-progress-max

maxlength attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: maxlength
reflected idl name: maxLength
attribute context: attribute-context-maxlength-input-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-maxlength
source: dom-textarea-maxlength

media attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: media
reflected idl name: media
attribute context: attribute-context-media-link-meta-source-style
snapshot date: 2026-07-18
source: attributes-3
source: dom-link-media
source: dom-meta-media
source: dom-source-media
source: dom-style-media

method attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: method
attribute context: attribute-context-method-form
snapshot date: 2026-07-18
source: attributes-3

min attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: min
reflected idl name: min
attribute context: attribute-context-min-input
attribute context: attribute-context-min-meter
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-min
source: dom-meter-min

minlength attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: minlength
reflected idl name: minLength
attribute context: attribute-context-minlength-input-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-minlength
source: dom-textarea-minlength

multiple attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: multiple
reflected idl name: multiple
attribute context: attribute-context-multiple-input-select
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-multiple
source: dom-select-multiple

muted attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: muted
reflected idl name: defaultMuted
attribute context: attribute-context-muted-audio-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-media-defaultmuted

name attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: name
reflected idl name: name
attribute context: attribute-context-name-button-fieldset-input-output-select-textarea-form-associated-custom-elements
attribute context: attribute-context-name-details
attribute context: attribute-context-name-form
attribute context: attribute-context-name-iframe-object
attribute context: attribute-context-name-map
attribute context: attribute-context-name-meta
attribute context: attribute-context-name-slot
snapshot date: 2026-07-18
source: attributes-3
source: dom-button-name
source: dom-details-name
source: dom-fe-name
source: dom-fieldset-name
source: dom-form-name
source: dom-iframe-name
source: dom-map-name
source: dom-meta-name
source: dom-object-name
source: dom-output-name
source: dom-select-name
source: dom-slot-name
source: dom-textarea-name

nomodule attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: nomodule
reflected idl name: noModule
attribute context: attribute-context-nomodule-script
snapshot date: 2026-07-18
source: attributes-3
source: dom-script-nomodule

nonce attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: nonce
attribute context: attribute-context-nonce-global
snapshot date: 2026-07-18
source: attributes-3

novalidate attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: novalidate
reflected idl name: noValidate
attribute context: attribute-context-novalidate-form
snapshot date: 2026-07-18
source: attributes-3
source: dom-fs-novalidate

open attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: open
reflected idl name: open
attribute context: attribute-context-open-details
attribute context: attribute-context-open-dialog
snapshot date: 2026-07-18
source: attributes-3
source: dom-details-open
source: dom-dialog-open

optimum attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: optimum
reflected idl name: optimum
attribute context: attribute-context-optimum-meter
snapshot date: 2026-07-18
source: attributes-3
source: dom-meter-optimum

pattern attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: pattern
reflected idl name: pattern
attribute context: attribute-context-pattern-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-pattern

ping attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: ping
reflected idl name: ping
attribute context: attribute-context-ping-a-area
snapshot date: 2026-07-18
source: attributes-3
source: dom-a-ping
source: dom-area-ping

placeholder attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: placeholder
reflected idl name: placeholder
attribute context: attribute-context-placeholder-input-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-placeholder
source: dom-textarea-placeholder

playsinline attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: playsinline
reflected idl name: playsInline
attribute context: attribute-context-playsinline-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-video-playsinline

popover attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: popover
attribute context: attribute-context-popover-global
snapshot date: 2026-07-18
source: attributes-3

popovertarget attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: popovertarget
attribute context: attribute-context-popovertarget-button-input
snapshot date: 2026-07-18
source: attributes-3

popovertargetaction attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: popovertargetaction
attribute context: attribute-context-popovertargetaction-button-input
snapshot date: 2026-07-18
source: attributes-3

poster attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: poster
reflected idl name: poster
attribute context: attribute-context-poster-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-video-poster

preload attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: preload
attribute context: attribute-context-preload-audio-video
snapshot date: 2026-07-18
source: attributes-3

readonly attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: readonly
reflected idl name: readOnly
attribute context: attribute-context-readonly-input-textarea
attribute context: attribute-context-readonly-form-associated-custom-elements
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-readonly
source: dom-textarea-readonly

referrerpolicy attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: referrerpolicy
attribute context: attribute-context-referrerpolicy-a-area-iframe-img-link-script
snapshot date: 2026-07-18
source: attributes-3

rel attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: rel
reflected idl name: rel
reflected idl name: relList
attribute context: attribute-context-rel-a-area
attribute context: attribute-context-rel-link
snapshot date: 2026-07-18
source: attributes-3
source: dom-a-rel
source: dom-area-rel
source: dom-form-rel
source: dom-link-rel
source: dom-a-rellist
source: dom-area-rellist
source: dom-form-rellist
source: dom-link-rellist

required attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: required
reflected idl name: required
attribute context: attribute-context-required-input-select-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-required
source: dom-select-required
source: dom-textarea-required

reversed attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: reversed
reflected idl name: reversed
attribute context: attribute-context-reversed-ol
snapshot date: 2026-07-18
source: attributes-3
source: dom-ol-reversed

rows attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: rows
reflected idl name: rows
attribute context: attribute-context-rows-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-textarea-rows

rowspan attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: rowspan
reflected idl name: rowSpan
attribute context: attribute-context-rowspan-td-th
snapshot date: 2026-07-18
source: attributes-3
source: dom-tdth-rowspan

sandbox attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: sandbox
reflected idl name: sandbox
attribute context: attribute-context-sandbox-iframe
snapshot date: 2026-07-18
source: attributes-3
source: dom-iframe-sandbox

scope attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: scope
attribute context: attribute-context-scope-th
snapshot date: 2026-07-18
source: attributes-3

selected attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: selected
reflected idl name: defaultSelected
attribute context: attribute-context-selected-option
snapshot date: 2026-07-18
source: attributes-3
source: dom-option-defaultselected

shadowrootclonable attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: shadowrootclonable
reflected idl name: shadowRootClonable
attribute context: attribute-context-shadowrootclonable-template
snapshot date: 2026-07-18
source: attributes-3
source: dom-template-shadowrootclonable

shadowrootcustomelementregistry attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: shadowrootcustomelementregistry
reflected idl name: shadowRootCustomElementRegistry
attribute context: attribute-context-shadowrootcustomelementregistry-template
snapshot date: 2026-07-18
source: attributes-3
source: dom-template-shadowrootcustomelementregistry

shadowrootdelegatesfocus attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: shadowrootdelegatesfocus
reflected idl name: shadowRootDelegatesFocus
attribute context: attribute-context-shadowrootdelegatesfocus-template
snapshot date: 2026-07-18
source: attributes-3
source: dom-template-shadowrootdelegatesfocus

shadowrootmode attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: shadowrootmode
attribute context: attribute-context-shadowrootmode-template
snapshot date: 2026-07-18
source: attributes-3

shadowrootserializable attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: shadowrootserializable
reflected idl name: shadowRootSerializable
attribute context: attribute-context-shadowrootserializable-template
snapshot date: 2026-07-18
source: attributes-3
source: dom-template-shadowrootserializable

shadowrootslotassignment attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: shadowrootslotassignment
attribute context: attribute-context-shadowrootslotassignment-template
snapshot date: 2026-07-18
source: attributes-3

shape attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: shape
reflected idl name: shape
attribute context: attribute-context-shape-area
snapshot date: 2026-07-18
source: attributes-3
source: dom-area-shape

size attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: size
reflected idl name: size
attribute context: attribute-context-size-input-select
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-size
source: dom-select-size

sizes attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: sizes
reflected idl name: sizes
attribute context: attribute-context-sizes-link
attribute context: attribute-context-sizes-img-source
snapshot date: 2026-07-18
source: attributes-3
source: dom-img-sizes
source: dom-link-sizes
source: dom-source-sizes

slot attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: slot
attribute context: attribute-context-slot-global
snapshot date: 2026-07-18
source: attributes-3

span attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: span
reflected idl name: span
attribute context: attribute-context-span-col-colgroup
snapshot date: 2026-07-18
source: attributes-3
source: dom-colgroup-span

spellcheck attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: spellcheck
attribute context: attribute-context-spellcheck-global
snapshot date: 2026-07-18
source: attributes-3

src attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: src
reflected idl name: src
attribute context: attribute-context-src-audio-embed-iframe-img-input-script-source-track-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-embed-src
source: dom-iframe-src
source: dom-img-src
source: dom-input-src
source: dom-media-src
source: dom-script-src
source: dom-source-src
source: dom-track-src

srcdoc attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: srcdoc
attribute context: attribute-context-srcdoc-iframe
snapshot date: 2026-07-18
source: attributes-3

srclang attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: srclang
reflected idl name: srclang
attribute context: attribute-context-srclang-track
snapshot date: 2026-07-18
source: attributes-3
source: dom-track-srclang

srcset attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: srcset
reflected idl name: srcset
attribute context: attribute-context-srcset-img-source
snapshot date: 2026-07-18
source: attributes-3
source: dom-img-srcset
source: dom-source-srcset

start attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: start
reflected idl name: start
attribute context: attribute-context-start-ol
snapshot date: 2026-07-18
source: attributes-3
source: dom-ol-start

step attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: step
reflected idl name: step
attribute context: attribute-context-step-input
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-step

style attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: style
attribute context: attribute-context-style-global
snapshot date: 2026-07-18
source: attributes-3

tabindex attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: tabindex
reflected idl name: tabIndex
attribute context: attribute-context-tabindex-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-tabindex

target attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: target
reflected idl name: target
attribute context: attribute-context-target-a-area
attribute context: attribute-context-target-base
attribute context: attribute-context-target-form
snapshot date: 2026-07-18
source: attributes-3
source: dom-a-target
source: dom-base-target
source: dom-fs-target

title attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: title
reflected idl name: title
attribute context: attribute-context-title-global
attribute context: attribute-context-title-abbr-dfn
attribute context: attribute-context-title-input
attribute context: attribute-context-title-link
attribute context: attribute-context-title-link-style
snapshot date: 2026-07-18
source: attributes-3
source: dom-title

translate attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: translate
attribute context: attribute-context-translate-global
snapshot date: 2026-07-18
source: attributes-3

type attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: type
reflected idl name: type
attribute context: attribute-context-type-a-link
attribute context: attribute-context-type-button
attribute context: attribute-context-type-embed-object-source
attribute context: attribute-context-type-input
attribute context: attribute-context-type-ol
attribute context: attribute-context-type-script
snapshot date: 2026-07-18
source: attributes-3
source: dom-a-type
source: dom-button-type
source: dom-embed-type
source: dom-link-type
source: dom-object-type
source: dom-ol-type
source: dom-script-type
source: dom-source-type

usemap attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: usemap
reflected idl name: useMap
attribute context: attribute-context-usemap-img
snapshot date: 2026-07-18
source: attributes-3
source: dom-img-usemap

value attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: value
reflected idl name: defaultValue
reflected idl name: value
attribute context: attribute-context-value-button-option
attribute context: attribute-context-value-data
attribute context: attribute-context-value-input
attribute context: attribute-context-value-li
attribute context: attribute-context-value-meter-progress
snapshot date: 2026-07-18
source: attributes-3
source: dom-input-defaultvalue
source: dom-button-value
source: dom-data-value
source: dom-li-value
source: dom-meter-value
source: dom-option-value
source: dom-progress-value

width attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: width
reflected idl name: width
attribute context: attribute-context-width-canvas-embed-iframe-img-input-object-source-video
snapshot date: 2026-07-18
source: attributes-3
source: dom-dim-width
source: dom-embed-width
source: dom-img-width
source: dom-input-width
source: dom-object-width
source: dom-source-width
source: dom-video-width

wrap attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: wrap
reflected idl name: wrap
attribute context: attribute-context-wrap-textarea
snapshot date: 2026-07-18
source: attributes-3
source: dom-textarea-wrap

writingsuggestions attribute
type: indexed HTML attribute definition
type: DatatypeProperty
domain: HTML element
range: string
attribute local name: writingsuggestions
reflected idl name: writingSuggestions
attribute context: attribute-context-writingsuggestions-global
snapshot date: 2026-07-18
source: attributes-3
source: dom-writingsuggestions

attribute-context-abbr-th
type: HTML attribute applicability and value context
attribute definition: abbr attribute
global attribute: false
applies to: th element
value syntax text: Text*
definition source: attr-th-abbr
value syntax source: attribute-text
description: Alternative label to use for the header cell when referencing the cell in other contexts
source: attributes-3

attribute-context-accept-input
type: HTML attribute applicability and value context
attribute definition: accept attribute
global attribute: false
applies to: input element
value syntax text: Set of comma-separated tokens* consisting of valid MIME type strings with no parameters or audio/*, video/*, or image/*
definition source: attr-input-accept
value syntax source: set-of-comma-separated-tokens
value syntax source: valid-mime-type-with-no-parameters
description: Hint for expected file type in file upload controls
source: attributes-3

attribute-context-accept-charset-form
type: HTML attribute applicability and value context
attribute definition: accept-charset attribute
global attribute: false
applies to: form element
value syntax text: ASCII case-insensitive match for "UTF-8"
definition source: attr-form-accept-charset
value syntax source: ascii-case-insensitive
description: Character encodings to use for form submission
source: attributes-3

attribute-context-accesskey-global
type: HTML attribute applicability and value context
attribute definition: accesskey attribute
global attribute: true
applies to: HTML element
value syntax text: Ordered set of unique space-separated tokens, none of which are identical to another, each consisting of one code point in length
definition source: the-accesskey-attribute
value syntax source: ordered-set-of-unique-space-separated-tokens
value syntax source: string-is
description: Keyboard shortcut to activate or focus element
source: attributes-3

attribute-context-action-form
type: HTML attribute applicability and value context
attribute definition: action attribute
global attribute: false
applies to: form element
value syntax text: Valid non-empty URL potentially surrounded by spaces
definition source: attr-fs-action
value syntax source: valid-non-empty-url-potentially-surrounded-by-spaces
description: URL to use for form submission
source: attributes-3

attribute-context-allow-iframe
type: HTML attribute applicability and value context
attribute definition: allow attribute
global attribute: false
applies to: iframe element
value syntax text: Serialized permissions policy
definition source: attr-iframe-allow
value syntax source: serialized-permissions-policy
description: Permissions policy to be applied to the iframe's contents
source: attributes-3

attribute-context-allowfullscreen-iframe
type: HTML attribute applicability and value context
attribute definition: allowfullscreen attribute
global attribute: false
applies to: iframe element
value syntax text: Boolean attribute
definition source: attr-iframe-allowfullscreen
value syntax source: boolean-attribute
description: Whether to allow the iframe's contents to use requestFullscreen()
source: attributes-3

attribute-context-alpha-input
type: HTML attribute applicability and value context
attribute definition: alpha attribute
global attribute: false
applies to: input element
value syntax text: Boolean attribute
definition source: attr-input-alpha
value syntax source: boolean-attribute
description: Allow the color's alpha component to be set
source: attributes-3

attribute-context-alt-area-img-input
type: HTML attribute applicability and value context
attribute definition: alt attribute
global attribute: false
applies to: area element
applies to: img element
applies to: input element
value syntax text: Text*
definition source: attr-img-alt
definition source: attr-area-alt
definition source: attr-input-alt
value syntax source: attribute-text
description: Replacement text for use when images are not available
source: attributes-3

attribute-context-as-link
type: HTML attribute applicability and value context
attribute definition: as attribute
global attribute: false
applies to: link element
value syntax text: Preload destination, for rel="preload"; module preload destination, for rel="modulepreload"
definition source: attr-link-as
value syntax source: link-type-modulepreload
value syntax source: link-type-preload
value syntax source: module-preload-destination
value syntax source: preload-destination
value syntax source: attr-link-rel
description: Destination for a preload request (for rel="preload" and rel="modulepreload")
source: attributes-3

attribute-context-async-script
type: HTML attribute applicability and value context
attribute definition: async attribute
global attribute: false
applies to: script element
value syntax text: Boolean attribute
definition source: attr-script-async
value syntax source: boolean-attribute
description: Execute script when available, without blocking while fetching
source: attributes-3

attribute-context-autocapitalize-global
type: HTML attribute applicability and value context
attribute definition: autocapitalize attribute
global attribute: true
applies to: HTML element
value syntax text: "on"; "off"; "none"; "sentences"; "words"; "characters"
definition source: attr-autocapitalize
value syntax source: attr-autocapitalize-characters
value syntax source: attr-autocapitalize-none
value syntax source: attr-autocapitalize-off
value syntax source: attr-autocapitalize-on
value syntax source: attr-autocapitalize-sentences
value syntax source: attr-autocapitalize-words
description: Recommended autocapitalization behavior (for supported input methods)
source: attributes-3

attribute-context-autocomplete-form
type: HTML attribute applicability and value context
attribute definition: autocomplete attribute
global attribute: false
applies to: form element
value syntax text: "on"; "off"
definition source: attr-form-autocomplete
description: Default setting for autofill feature for controls in the form
source: attributes-3

attribute-context-autocomplete-input-select-textarea
type: HTML attribute applicability and value context
attribute definition: autocomplete attribute
global attribute: false
applies to: input element
applies to: select element
applies to: textarea element
value syntax text: Autofill field name and related tokens*
definition source: attr-fe-autocomplete
value syntax source: autofill-field
description: Hint for form autofill feature
source: attributes-3

attribute-context-autocorrect-global
type: HTML attribute applicability and value context
attribute definition: autocorrect attribute
global attribute: true
applies to: HTML element
value syntax text: "on"; "off"; the empty string
definition source: attr-autocorrect
value syntax source: attr-autocorrect-off
value syntax source: attr-autocorrect-on
description: Recommended autocorrection behavior (for supported input methods)
source: attributes-3

attribute-context-autofocus-global
type: HTML attribute applicability and value context
attribute definition: autofocus attribute
global attribute: true
applies to: HTML element
value syntax text: Boolean attribute
definition source: attr-fe-autofocus
value syntax source: boolean-attribute
description: Automatically focus the element when the page is loaded
source: attributes-3

attribute-context-autoplay-audio-video
type: HTML attribute applicability and value context
attribute definition: autoplay attribute
global attribute: false
applies to: audio element
applies to: video element
value syntax text: Boolean attribute
definition source: attr-media-autoplay
value syntax source: boolean-attribute
description: Hint that the media resource can be started automatically when the page is loaded
source: attributes-3

attribute-context-blocking-link-script-style
type: HTML attribute applicability and value context
attribute definition: blocking attribute
global attribute: false
applies to: link element
applies to: script element
applies to: style element
value syntax text: Unordered set of unique space-separated tokens*
definition source: attr-script-blocking
definition source: attr-link-blocking
definition source: attr-style-blocking
value syntax source: unordered-set-of-unique-space-separated-tokens
description: Whether the element is potentially render-blocking
source: attributes-3

attribute-context-charset-meta
type: HTML attribute applicability and value context
attribute definition: charset attribute
global attribute: false
applies to: meta element
value syntax text: "utf-8"
definition source: attr-meta-charset
description: Character encoding declaration
source: attributes-3

attribute-context-checked-input
type: HTML attribute applicability and value context
attribute definition: checked attribute
global attribute: false
applies to: input element
value syntax text: Boolean attribute
definition source: attr-input-checked
value syntax source: boolean-attribute
description: Whether the control is checked
source: attributes-3

attribute-context-cite-blockquote-del-ins-q
type: HTML attribute applicability and value context
attribute definition: cite attribute
global attribute: false
applies to: blockquote element
applies to: del element
applies to: ins element
applies to: q element
value syntax text: Valid URL potentially surrounded by spaces
definition source: attr-mod-cite
definition source: attr-blockquote-cite
definition source: attr-q-cite
value syntax source: valid-url-potentially-surrounded-by-spaces
description: Link to the source of the quotation or more information about the edit
source: attributes-3

attribute-context-class-global
type: HTML attribute applicability and value context
attribute definition: class attribute
global attribute: true
applies to: HTML element
value syntax text: Set of space-separated tokens
definition source: classes
value syntax source: set-of-space-separated-tokens
description: Classes to which the element belongs
source: attributes-3

attribute-context-closedby-dialog
type: HTML attribute applicability and value context
attribute definition: closedby attribute
global attribute: false
applies to: dialog element
value syntax text: "any"; "closerequest"; "none";
definition source: attr-dialog-closedby
value syntax source: attr-dialog-closedby-any
value syntax source: attr-dialog-closedby-closerequest
value syntax source: attr-dialog-closedby-none
description: Which user actions will close the dialog
source: attributes-3

attribute-context-color-link
type: HTML attribute applicability and value context
attribute definition: color attribute
global attribute: false
applies to: link element
value syntax text: CSS <color>
definition source: attr-link-color
value syntax source: typedef-color
description: Color to use when customizing a site's icon (for rel="mask-icon")
source: attributes-3

attribute-context-colorspace-input
type: HTML attribute applicability and value context
attribute definition: colorspace attribute
global attribute: false
applies to: input element
value syntax text: "limited-srgb"; "display-p3"
definition source: attr-input-colorspace
value syntax source: attr-input-colorspace-display-p3
value syntax source: attr-input-colorspace-limited-srgb
description: The color space of the serialized color
source: attributes-3

attribute-context-cols-textarea
type: HTML attribute applicability and value context
attribute definition: cols attribute
global attribute: false
applies to: textarea element
value syntax text: Valid non-negative integer greater than zero
definition source: attr-textarea-cols
value syntax source: valid-non-negative-integer
description: Maximum number of characters per line
source: attributes-3

attribute-context-colspan-td-th
type: HTML attribute applicability and value context
attribute definition: colspan attribute
global attribute: false
applies to: td element
applies to: th element
value syntax text: Valid non-negative integer greater than zero
definition source: attr-tdth-colspan
value syntax source: valid-non-negative-integer
description: Number of columns that the cell is to span
source: attributes-3

attribute-context-command-button
type: HTML attribute applicability and value context
attribute definition: command attribute
global attribute: false
applies to: button element
value syntax text: "toggle-popover"; "show-popover"; "hide-popover"; "close"; "request-close"; "show-modal"; a custom command keyword
definition source: attr-button-command
value syntax source: attr-button-command-close
value syntax source: attr-button-command-custom
value syntax source: attr-button-command-hide-popover
value syntax source: attr-button-command-request-close
value syntax source: attr-button-command-show-modal
value syntax source: attr-button-command-show-popover
value syntax source: attr-button-command-toggle-popover
description: Indicates to the targeted element which action to take.
source: attributes-3

attribute-context-commandfor-button
type: HTML attribute applicability and value context
attribute definition: commandfor attribute
global attribute: false
applies to: button element
value syntax text: ID*
definition source: attr-button-commandfor
value syntax source: concept-id
description: Targets another element to be invoked.
source: attributes-3

attribute-context-content-meta
type: HTML attribute applicability and value context
attribute definition: content attribute
global attribute: false
applies to: meta element
value syntax text: Text*
definition source: attr-meta-content
value syntax source: attribute-text
description: Value of the element
source: attributes-3

attribute-context-contenteditable-global
type: HTML attribute applicability and value context
attribute definition: contenteditable attribute
global attribute: true
applies to: HTML element
value syntax text: "true"; "false"; "plaintext-only"; the empty string
definition source: attr-contenteditable
description: Whether the element is editable
source: attributes-3

attribute-context-controls-audio-img-video
type: HTML attribute applicability and value context
attribute definition: controls attribute
global attribute: false
applies to: audio element
applies to: img element
applies to: video element
value syntax text: Boolean attribute
definition source: attr-img-controls
definition source: attr-media-controls
value syntax source: boolean-attribute
description: Show user agent controls
source: attributes-3

attribute-context-coords-area
type: HTML attribute applicability and value context
attribute definition: coords attribute
global attribute: false
applies to: area element
value syntax text: Valid list of floating-point numbers*
definition source: attr-area-coords
value syntax source: valid-list-of-floating-point-numbers
description: Coordinates for the shape to be created in an image map
source: attributes-3

attribute-context-crossorigin-audio-img-link-script-video
type: HTML attribute applicability and value context
attribute definition: crossorigin attribute
global attribute: false
applies to: audio element
applies to: img element
applies to: link element
applies to: script element
applies to: video element
value syntax text: "anonymous"; "use-credentials"; the empty string
definition source: attr-img-crossorigin
definition source: attr-media-crossorigin
definition source: attr-script-crossorigin
definition source: attr-link-crossorigin
value syntax source: attr-crossorigin-anonymous-keyword
value syntax source: attr-crossorigin-use-credentials-keyword
description: How the element handles crossorigin requests
source: attributes-3

attribute-context-data-object
type: HTML attribute applicability and value context
attribute definition: data attribute
global attribute: false
applies to: object element
value syntax text: Valid non-empty URL potentially surrounded by spaces
definition source: attr-object-data
value syntax source: valid-non-empty-url-potentially-surrounded-by-spaces
description: Address of the resource
source: attributes-3

attribute-context-datetime-del-ins
type: HTML attribute applicability and value context
attribute definition: datetime attribute
global attribute: false
applies to: del element
applies to: ins element
value syntax text: Valid date string with optional time
definition source: attr-mod-datetime
value syntax source: valid-date-string-with-optional-time
description: Date and (optionally) time of the change
source: attributes-3

attribute-context-datetime-time
type: HTML attribute applicability and value context
attribute definition: datetime attribute
global attribute: false
applies to: time element
value syntax text: Valid month string, valid date string, valid yearless date string, valid time string, valid local date and time string, valid time-zone offset string, valid global date and time string, valid week string, valid non-negative integer, or valid duration string
definition source: attr-time-datetime
value syntax source: valid-date-string
value syntax source: valid-duration-string
value syntax source: valid-global-date-and-time-string
value syntax source: valid-local-date-and-time-string
value syntax source: valid-month-string
value syntax source: valid-non-negative-integer
value syntax source: valid-time-string
value syntax source: valid-time-zone-offset-string
value syntax source: valid-week-string
value syntax source: valid-yearless-date-string
description: Machine-readable value
source: attributes-3

attribute-context-decoding-img
type: HTML attribute applicability and value context
attribute definition: decoding attribute
global attribute: false
applies to: img element
value syntax text: "sync"; "async"; "auto"
definition source: attr-img-decoding
value syntax source: attr-img-decoding-async
value syntax source: attr-img-decoding-auto
value syntax source: attr-img-decoding-sync
description: Decoding hint to use when processing this image for presentation
source: attributes-3

attribute-context-default-track
type: HTML attribute applicability and value context
attribute definition: default attribute
global attribute: false
applies to: track element
value syntax text: Boolean attribute
definition source: attr-track-default
value syntax source: boolean-attribute
description: Enable the track if no other text track is more suitable
source: attributes-3

attribute-context-defer-script
type: HTML attribute applicability and value context
attribute definition: defer attribute
global attribute: false
applies to: script element
value syntax text: Boolean attribute
definition source: attr-script-defer
value syntax source: boolean-attribute
description: Defer script execution
source: attributes-3

attribute-context-dir-global
type: HTML attribute applicability and value context
attribute definition: dir attribute
global attribute: true
applies to: HTML element
value syntax text: "ltr"; "rtl"; "auto"
definition source: attr-dir
value syntax source: attr-dir-auto
value syntax source: attr-dir-ltr
value syntax source: attr-dir-rtl
description: The text directionality of the element
source: attributes-3

attribute-context-dir-bdo
type: HTML attribute applicability and value context
attribute definition: dir attribute
global attribute: false
applies to: bdo element
value syntax text: "ltr"; "rtl"
definition source: the-bdo-element
value syntax source: attr-dir-ltr
value syntax source: attr-dir-rtl
description: The text directionality of the element
source: attributes-3

attribute-context-dirname-input-textarea
type: HTML attribute applicability and value context
attribute definition: dirname attribute
global attribute: false
applies to: input element
applies to: textarea element
value syntax text: Text*
definition source: attr-fe-dirname
value syntax source: attribute-text
description: Name of form control to use for sending the element's directionality in form submission
source: attributes-3

attribute-context-disabled-button-input-optgroup-option-select-textarea-form-associated-custom-elements
type: HTML attribute applicability and value context
attribute definition: disabled attribute
global attribute: false
applies to: button element
applies to: input element
applies to: optgroup element
applies to: option element
applies to: select element
applies to: textarea element
applicable participant: form-associated-custom-elements
value syntax text: Boolean attribute
definition source: attr-fe-disabled
definition source: attr-optgroup-disabled
definition source: attr-option-disabled
value syntax source: boolean-attribute
description: Whether the form control is disabled
source: attributes-3

attribute-context-disabled-fieldset
type: HTML attribute applicability and value context
attribute definition: disabled attribute
global attribute: false
applies to: fieldset element
value syntax text: Boolean attribute
definition source: attr-fieldset-disabled
value syntax source: boolean-attribute
description: Whether the descendant form controls, except any inside legend, are disabled
source: attributes-3

attribute-context-disabled-link
type: HTML attribute applicability and value context
attribute definition: disabled attribute
global attribute: false
applies to: link element
value syntax text: Boolean attribute
definition source: attr-link-disabled
value syntax source: boolean-attribute
description: Whether the link is disabled
source: attributes-3

attribute-context-download-a-area
type: HTML attribute applicability and value context
attribute definition: download attribute
global attribute: false
applies to: a element
applies to: area element
value syntax text: Text
definition source: attr-hyperlink-download
description: Whether to download the resource instead of navigating to it, and its filename if so
source: attributes-3

attribute-context-draggable-global
type: HTML attribute applicability and value context
attribute definition: draggable attribute
global attribute: true
applies to: HTML element
value syntax text: "true"; "false"
definition source: attr-draggable
description: Whether the element is draggable
source: attributes-3

attribute-context-enctype-form
type: HTML attribute applicability and value context
attribute definition: enctype attribute
global attribute: false
applies to: form element
value syntax text: "application/x-www-form-urlencoded"; "multipart/form-data"; "text/plain"
definition source: attr-fs-enctype
value syntax source: attr-fs-enctype-formdata
value syntax source: attr-fs-enctype-text
value syntax source: attr-fs-enctype-urlencoded
description: Entry list encoding type to use for form submission
source: attributes-3

attribute-context-enterkeyhint-global
type: HTML attribute applicability and value context
attribute definition: enterkeyhint attribute
global attribute: true
applies to: HTML element
value syntax text: "enter"; "done"; "go"; "next"; "previous"; "search"; "send"
definition source: attr-enterkeyhint
value syntax source: attr-enterkeyhint-keyword-done
value syntax source: attr-enterkeyhint-keyword-enter
value syntax source: attr-enterkeyhint-keyword-go
value syntax source: attr-enterkeyhint-keyword-next
value syntax source: attr-enterkeyhint-keyword-previous
value syntax source: attr-enterkeyhint-keyword-search
value syntax source: attr-enterkeyhint-keyword-send
description: Hint for selecting an enter key action
source: attributes-3

attribute-context-fetchpriority-img-link-script
type: HTML attribute applicability and value context
attribute definition: fetchpriority attribute
global attribute: false
applies to: img element
applies to: link element
applies to: script element
value syntax text: "auto"; "high"; "low"
definition source: attr-img-fetchpriority
definition source: attr-script-fetchpriority
definition source: attr-link-fetchpriority
value syntax source: attr-fetchpriority-auto
value syntax source: attr-fetchpriority-high
value syntax source: attr-fetchpriority-low
description: Sets the priority for fetches initiated by the element
source: attributes-3

attribute-context-for-label
type: HTML attribute applicability and value context
attribute definition: for attribute
global attribute: false
applies to: label element
value syntax text: ID*
definition source: attr-label-for
value syntax source: concept-id
description: Associate the label with form control
source: attributes-3

attribute-context-for-output
type: HTML attribute applicability and value context
attribute definition: for attribute
global attribute: false
applies to: output element
value syntax text: Unordered set of unique space-separated tokens consisting of IDs*
definition source: attr-output-for
value syntax source: unordered-set-of-unique-space-separated-tokens
description: Specifies controls from which the output was calculated
source: attributes-3

attribute-context-form-button-fieldset-input-object-output-select-textarea-form-associated-custom-elements
type: HTML attribute applicability and value context
attribute definition: form attribute
global attribute: false
applies to: button element
applies to: fieldset element
applies to: input element
applies to: object element
applies to: output element
applies to: select element
applies to: textarea element
applicable participant: form-associated-custom-elements
value syntax text: ID*
definition source: attr-fae-form
value syntax source: concept-id
description: Associates the element with a form element
source: attributes-3

attribute-context-formaction-button-input
type: HTML attribute applicability and value context
attribute definition: formaction attribute
global attribute: false
applies to: button element
applies to: input element
value syntax text: Valid non-empty URL potentially surrounded by spaces
definition source: attr-fs-formaction
value syntax source: valid-non-empty-url-potentially-surrounded-by-spaces
description: URL to use for form submission
source: attributes-3

attribute-context-formenctype-button-input
type: HTML attribute applicability and value context
attribute definition: formenctype attribute
global attribute: false
applies to: button element
applies to: input element
value syntax text: "application/x-www-form-urlencoded"; "multipart/form-data"; "text/plain"
definition source: attr-fs-formenctype
value syntax source: attr-fs-enctype-formdata
value syntax source: attr-fs-enctype-text
value syntax source: attr-fs-enctype-urlencoded
description: Entry list encoding type to use for form submission
source: attributes-3

attribute-context-formmethod-button-input
type: HTML attribute applicability and value context
attribute definition: formmethod attribute
global attribute: false
applies to: button element
applies to: input element
value syntax text: "get"; "post"; "dialog"
definition source: attr-fs-formmethod
value syntax source: attr-fs-method-dialog-keyword
value syntax source: attr-fs-method-get-keyword
value syntax source: attr-fs-method-post-keyword
description: Variant to use for form submission
source: attributes-3

attribute-context-formnovalidate-button-input
type: HTML attribute applicability and value context
attribute definition: formnovalidate attribute
global attribute: false
applies to: button element
applies to: input element
value syntax text: Boolean attribute
definition source: attr-fs-formnovalidate
value syntax source: boolean-attribute
description: Bypass form control validation for form submission
source: attributes-3

attribute-context-formtarget-button-input
type: HTML attribute applicability and value context
attribute definition: formtarget attribute
global attribute: false
applies to: button element
applies to: input element
value syntax text: Valid navigable target name or keyword
definition source: attr-fs-formtarget
value syntax source: valid-navigable-target-name-or-keyword
description: Navigable for form submission
source: attributes-3

attribute-context-headers-td-th
type: HTML attribute applicability and value context
attribute definition: headers attribute
global attribute: false
applies to: td element
applies to: th element
value syntax text: Unordered set of unique space-separated tokens consisting of IDs*
definition source: attr-tdth-headers
value syntax source: unordered-set-of-unique-space-separated-tokens
description: The header cells for this cell
source: attributes-3

attribute-context-headingoffset-global
type: HTML attribute applicability and value context
attribute definition: headingoffset attribute
global attribute: true
applies to: HTML element
value syntax text: Valid non-negative integer between 0 and 8
definition source: attr-tabindex
value syntax source: valid-non-negative-integer
description: Offsets heading levels for descendants
source: attributes-3

attribute-context-headingreset-global
type: HTML attribute applicability and value context
attribute definition: headingreset attribute
global attribute: true
applies to: HTML element
value syntax text: Boolean attribute
definition source: attr-tabindex
value syntax source: boolean-attribute
description: Prevents a heading offset computation from traversing beyond the element with the attribute
source: attributes-3

attribute-context-height-canvas-embed-iframe-img-input-object-source-video
type: HTML attribute applicability and value context
attribute definition: height attribute
global attribute: false
applies to: canvas element
applies to: embed element
applies to: iframe element
applies to: img element
applies to: input element
applies to: object element
applies to: source element
applies to: video element
value syntax text: Valid non-negative integer
definition source: attr-canvas-height
definition source: attr-dim-height
value syntax source: valid-non-negative-integer
description: Vertical dimension
source: attributes-3

attribute-context-hidden-global
type: HTML attribute applicability and value context
attribute definition: hidden attribute
global attribute: true
applies to: HTML element
value syntax text: "until-found"; "hidden"; the empty string
definition source: attr-hidden
value syntax source: attr-hidden
value syntax source: attr-hidden-until-found
description: Whether the element is relevant
source: attributes-3

attribute-context-high-meter
type: HTML attribute applicability and value context
attribute definition: high attribute
global attribute: false
applies to: meter element
value syntax text: Valid floating-point number*
definition source: attr-meter-high
value syntax source: valid-floating-point-number
description: Low limit of high range
source: attributes-3

attribute-context-href-a-area
type: HTML attribute applicability and value context
attribute definition: href attribute
global attribute: false
applies to: a element
applies to: area element
value syntax text: Valid URL potentially surrounded by spaces
definition source: attr-hyperlink-href
value syntax source: valid-url-potentially-surrounded-by-spaces
description: Address of the hyperlink
source: attributes-3

attribute-context-href-link
type: HTML attribute applicability and value context
attribute definition: href attribute
global attribute: false
applies to: link element
value syntax text: Valid non-empty URL potentially surrounded by spaces
definition source: attr-link-href
value syntax source: valid-non-empty-url-potentially-surrounded-by-spaces
description: Address of the hyperlink
source: attributes-3

attribute-context-href-base
type: HTML attribute applicability and value context
attribute definition: href attribute
global attribute: false
applies to: base element
value syntax text: Valid URL potentially surrounded by spaces
definition source: attr-base-href
value syntax source: valid-url-potentially-surrounded-by-spaces
description: Document base URL
source: attributes-3

attribute-context-hreflang-a-link
type: HTML attribute applicability and value context
attribute definition: hreflang attribute
global attribute: false
applies to: a element
applies to: link element
value syntax text: Valid BCP 47 language tag
definition source: attr-hyperlink-hreflang
definition source: attr-link-hreflang
description: Language of the linked resource
source: attributes-3

attribute-context-http-equiv-meta
type: HTML attribute applicability and value context
attribute definition: http-equiv attribute
global attribute: false
applies to: meta element
value syntax text: "content-type"; "default-style"; "refresh"; "x-ua-compatible"; "content-security-policy"
definition source: attr-meta-http-equiv
value syntax source: attr-meta-http-equiv-keyword-content-security-policy
value syntax source: attr-meta-http-equiv-keyword-content-type
value syntax source: attr-meta-http-equiv-keyword-default-style
value syntax source: attr-meta-http-equiv-keyword-refresh
value syntax source: attr-meta-http-equiv-keyword-x-ua-compatible
description: Pragma directive
source: attributes-3

attribute-context-id-global
type: HTML attribute applicability and value context
attribute definition: id attribute
global attribute: true
applies to: HTML element
value syntax text: Text*
definition source: the-id-attribute
value syntax source: attribute-text
description: The element's ID
source: attributes-3

attribute-context-imagesizes-link
type: HTML attribute applicability and value context
attribute definition: imagesizes attribute
global attribute: false
applies to: link element
value syntax text: Valid source size list
definition source: attr-link-imagesizes
value syntax source: valid-source-size-list
description: Image sizes for different page layouts (for rel="preload")
source: attributes-3

attribute-context-imagesrcset-link
type: HTML attribute applicability and value context
attribute definition: imagesrcset attribute
global attribute: false
applies to: link element
value syntax text: Comma-separated list of image candidate strings
definition source: attr-link-imagesrcset
value syntax source: image-candidate-string
description: Images to use in different situations, e.g., high-resolution displays, small monitors, etc. (for rel="preload")
source: attributes-3

attribute-context-inert-global
type: HTML attribute applicability and value context
attribute definition: inert attribute
global attribute: true
applies to: HTML element
value syntax text: Boolean attribute
definition source: the-inert-attribute
value syntax source: boolean-attribute
description: Whether the element is inert.
source: attributes-3

attribute-context-inputmode-global
type: HTML attribute applicability and value context
attribute definition: inputmode attribute
global attribute: true
applies to: HTML element
value syntax text: "none"; "text"; "tel"; "email"; "url"; "numeric"; "decimal"; "search"
definition source: attr-inputmode
value syntax source: attr-inputmode-keyword-decimal
value syntax source: attr-inputmode-keyword-email
value syntax source: attr-inputmode-keyword-none
value syntax source: attr-inputmode-keyword-numeric
value syntax source: attr-inputmode-keyword-search
value syntax source: attr-inputmode-keyword-tel
value syntax source: attr-inputmode-keyword-text
value syntax source: attr-inputmode-keyword-url
description: Hint for selecting an input modality
source: attributes-3

attribute-context-integrity-link-script
type: HTML attribute applicability and value context
attribute definition: integrity attribute
global attribute: false
applies to: link element
applies to: script element
value syntax text: Text
definition source: attr-script-integrity
definition source: attr-link-integrity
value syntax source: attribute-text
description: Integrity metadata used in Subresource Integrity checks [SRI]
source: attributes-3

attribute-context-is-global
type: HTML attribute applicability and value context
attribute definition: is attribute
global attribute: true
applies to: HTML element
value syntax text: Valid custom element name of a defined customized built-in element
definition source: attr-is
value syntax source: customized-built-in-element
value syntax source: valid-custom-element-name
description: Creates a customized built-in element
source: attributes-3

attribute-context-ismap-img
type: HTML attribute applicability and value context
attribute definition: ismap attribute
global attribute: false
applies to: img element
value syntax text: Boolean attribute
definition source: attr-img-ismap
value syntax source: boolean-attribute
description: Whether the image is a server-side image map
source: attributes-3

attribute-context-itemid-global
type: HTML attribute applicability and value context
attribute definition: itemid attribute
global attribute: true
applies to: HTML element
value syntax text: Valid URL potentially surrounded by spaces
definition source: attr-itemid
value syntax source: valid-url-potentially-surrounded-by-spaces
description: Global identifier for a microdata item
source: attributes-3

attribute-context-itemprop-global
type: HTML attribute applicability and value context
attribute definition: itemprop attribute
global attribute: true
applies to: HTML element
value syntax text: Unordered set of unique space-separated tokens consisting of valid absolute URLs, defined property names, or text*
definition source: names:-the-itemprop-attribute
value syntax source: unordered-set-of-unique-space-separated-tokens
value syntax source: defined-property-name
value syntax source: syntax-url-absolute
description: Property names of a microdata item
source: attributes-3

attribute-context-itemref-global
type: HTML attribute applicability and value context
attribute definition: itemref attribute
global attribute: true
applies to: HTML element
value syntax text: Unordered set of unique space-separated tokens consisting of IDs*
definition source: attr-itemref
value syntax source: unordered-set-of-unique-space-separated-tokens
description: Referenced elements
source: attributes-3

attribute-context-itemscope-global
type: HTML attribute applicability and value context
attribute definition: itemscope attribute
global attribute: true
applies to: HTML element
value syntax text: Boolean attribute
definition source: attr-itemscope
value syntax source: boolean-attribute
description: Introduces a microdata item
source: attributes-3

attribute-context-itemtype-global
type: HTML attribute applicability and value context
attribute definition: itemtype attribute
global attribute: true
applies to: HTML element
value syntax text: Unordered set of unique space-separated tokens consisting of valid absolute URLs*
definition source: attr-itemtype
value syntax source: unordered-set-of-unique-space-separated-tokens
value syntax source: syntax-url-absolute
description: Item types of a microdata item
source: attributes-3

attribute-context-kind-track
type: HTML attribute applicability and value context
attribute definition: kind attribute
global attribute: false
applies to: track element
value syntax text: "subtitles"; "captions"; "descriptions"; "chapters"; "metadata"
definition source: attr-track-kind
value syntax source: attr-track-kind-keyword-captions
value syntax source: attr-track-kind-keyword-chapters
value syntax source: attr-track-kind-keyword-descriptions
value syntax source: attr-track-kind-keyword-metadata
value syntax source: attr-track-kind-keyword-subtitles
description: The type of text track
source: attributes-3

attribute-context-label-optgroup-option-track
type: HTML attribute applicability and value context
attribute definition: label attribute
global attribute: false
applies to: optgroup element
applies to: option element
applies to: track element
value syntax text: Text
definition source: attr-optgroup-label
definition source: attr-option-label
definition source: attr-track-label
value syntax source: attribute-text
description: User-visible label
source: attributes-3

attribute-context-lang-global
type: HTML attribute applicability and value context
attribute definition: lang attribute
global attribute: true
applies to: HTML element
value syntax text: Valid BCP 47 language tag or the empty string
definition source: attr-lang
description: Language of the element
source: attributes-3

attribute-context-list-input
type: HTML attribute applicability and value context
attribute definition: list attribute
global attribute: false
applies to: input element
value syntax text: ID*
definition source: attr-input-list
value syntax source: concept-id
description: List of autocomplete options
source: attributes-3

attribute-context-loading-audio-iframe-img-video
type: HTML attribute applicability and value context
attribute definition: loading attribute
global attribute: false
applies to: audio element
applies to: iframe element
applies to: img element
applies to: video element
value syntax text: "lazy"; "eager"
definition source: attr-img-loading
definition source: attr-iframe-loading
definition source: attr-media-loading
value syntax source: attr-loading-eager
value syntax source: attr-loading-lazy
description: Used when determining loading deferral
source: attributes-3

attribute-context-loop-audio-video
type: HTML attribute applicability and value context
attribute definition: loop attribute
global attribute: false
applies to: audio element
applies to: video element
value syntax text: Boolean attribute
definition source: attr-media-loop
value syntax source: boolean-attribute
description: Whether to loop the media resource
source: attributes-3

attribute-context-low-meter
type: HTML attribute applicability and value context
attribute definition: low attribute
global attribute: false
applies to: meter element
value syntax text: Valid floating-point number*
definition source: attr-meter-low
value syntax source: valid-floating-point-number
description: High limit of low range
source: attributes-3

attribute-context-max-input
type: HTML attribute applicability and value context
attribute definition: max attribute
global attribute: false
applies to: input element
value syntax text: Varies*
definition source: attr-input-max
description: Maximum value
source: attributes-3

attribute-context-max-meter-progress
type: HTML attribute applicability and value context
attribute definition: max attribute
global attribute: false
applies to: meter element
applies to: progress element
value syntax text: Valid floating-point number*
definition source: attr-meter-max
definition source: attr-progress-max
value syntax source: valid-floating-point-number
description: Upper bound of range
source: attributes-3

attribute-context-maxlength-input-textarea
type: HTML attribute applicability and value context
attribute definition: maxlength attribute
global attribute: false
applies to: input element
applies to: textarea element
value syntax text: Valid non-negative integer
definition source: attr-textarea-maxlength
definition source: attr-input-maxlength
value syntax source: valid-non-negative-integer
description: Maximum length of value
source: attributes-3

attribute-context-media-link-meta-source-style
type: HTML attribute applicability and value context
attribute definition: media attribute
global attribute: false
applies to: link element
applies to: meta element
applies to: source element
applies to: style element
value syntax text: Valid media query list
definition source: attr-source-media
definition source: attr-link-media
definition source: attr-meta-media
definition source: attr-style-media
value syntax source: valid-media-query-list
description: Applicable media
source: attributes-3

attribute-context-method-form
type: HTML attribute applicability and value context
attribute definition: method attribute
global attribute: false
applies to: form element
value syntax text: "get"; "post"; "dialog"
definition source: attr-fs-method
value syntax source: attr-fs-method-dialog-keyword
value syntax source: attr-fs-method-get-keyword
value syntax source: attr-fs-method-post-keyword
description: Variant to use for form submission
source: attributes-3

attribute-context-min-input
type: HTML attribute applicability and value context
attribute definition: min attribute
global attribute: false
applies to: input element
value syntax text: Varies*
definition source: attr-input-min
description: Minimum value
source: attributes-3

attribute-context-min-meter
type: HTML attribute applicability and value context
attribute definition: min attribute
global attribute: false
applies to: meter element
value syntax text: Valid floating-point number*
definition source: attr-meter-min
value syntax source: valid-floating-point-number
description: Lower bound of range
source: attributes-3

attribute-context-minlength-input-textarea
type: HTML attribute applicability and value context
attribute definition: minlength attribute
global attribute: false
applies to: input element
applies to: textarea element
value syntax text: Valid non-negative integer
definition source: attr-textarea-minlength
definition source: attr-input-minlength
value syntax source: valid-non-negative-integer
description: Minimum length of value
source: attributes-3

attribute-context-multiple-input-select
type: HTML attribute applicability and value context
attribute definition: multiple attribute
global attribute: false
applies to: input element
applies to: select element
value syntax text: Boolean attribute
definition source: attr-select-multiple
definition source: attr-input-multiple
value syntax source: boolean-attribute
description: Whether to allow multiple values
source: attributes-3

attribute-context-muted-audio-video
type: HTML attribute applicability and value context
attribute definition: muted attribute
global attribute: false
applies to: audio element
applies to: video element
value syntax text: Boolean attribute
definition source: attr-media-muted
value syntax source: boolean-attribute
description: Whether to mute the media resource by default
source: attributes-3

attribute-context-name-button-fieldset-input-output-select-textarea-form-associated-custom-elements
type: HTML attribute applicability and value context
attribute definition: name attribute
global attribute: false
applies to: button element
applies to: fieldset element
applies to: input element
applies to: output element
applies to: select element
applies to: textarea element
applicable participant: form-associated-custom-elements
value syntax text: Text*
definition source: attr-fe-name
value syntax source: attribute-text
description: Name of the element to use for form submission and in the form.elements API
source: attributes-3

attribute-context-name-details
type: HTML attribute applicability and value context
attribute definition: name attribute
global attribute: false
applies to: details element
value syntax text: Text*
definition source: attr-details-name
value syntax source: attribute-text
description: Name of group of mutually-exclusive details elements
source: attributes-3

attribute-context-name-form
type: HTML attribute applicability and value context
attribute definition: name attribute
global attribute: false
applies to: form element
value syntax text: Text*
definition source: attr-form-name
value syntax source: attribute-text
description: Name of form to use in the document.forms API
source: attributes-3

attribute-context-name-iframe-object
type: HTML attribute applicability and value context
attribute definition: name attribute
global attribute: false
applies to: iframe element
applies to: object element
value syntax text: Valid navigable target name or keyword
definition source: attr-iframe-name
definition source: attr-object-name
value syntax source: valid-navigable-target-name-or-keyword
description: Name of content navigable
source: attributes-3

attribute-context-name-map
type: HTML attribute applicability and value context
attribute definition: name attribute
global attribute: false
applies to: map element
value syntax text: Text*
definition source: attr-map-name
value syntax source: attribute-text
description: Name of image map to reference from the usemap attribute
source: attributes-3

attribute-context-name-meta
type: HTML attribute applicability and value context
attribute definition: name attribute
global attribute: false
applies to: meta element
value syntax text: Text*
definition source: attr-meta-name
value syntax source: attribute-text
description: Metadata name
source: attributes-3

attribute-context-name-slot
type: HTML attribute applicability and value context
attribute definition: name attribute
global attribute: false
applies to: slot element
value syntax text: Text
definition source: attr-slot-name
value syntax source: attribute-text
description: Name of shadow tree slot
source: attributes-3

attribute-context-nomodule-script
type: HTML attribute applicability and value context
attribute definition: nomodule attribute
global attribute: false
applies to: script element
value syntax text: Boolean attribute
definition source: attr-script-nomodule
value syntax source: boolean-attribute
description: Prevents execution in user agents that support module scripts
source: attributes-3

attribute-context-nonce-global
type: HTML attribute applicability and value context
attribute definition: nonce attribute
global attribute: true
applies to: HTML element
value syntax text: Text
definition source: attr-nonce
value syntax source: attribute-text
description: Cryptographic nonce used in Content Security Policy checks [CSP]
source: attributes-3

attribute-context-novalidate-form
type: HTML attribute applicability and value context
attribute definition: novalidate attribute
global attribute: false
applies to: form element
value syntax text: Boolean attribute
definition source: attr-fs-novalidate
value syntax source: boolean-attribute
description: Bypass form control validation for form submission
source: attributes-3

attribute-context-open-details
type: HTML attribute applicability and value context
attribute definition: open attribute
global attribute: false
applies to: details element
value syntax text: Boolean attribute
definition source: attr-details-open
value syntax source: boolean-attribute
description: Whether the details are visible
source: attributes-3

attribute-context-open-dialog
type: HTML attribute applicability and value context
attribute definition: open attribute
global attribute: false
applies to: dialog element
value syntax text: Boolean attribute
definition source: attr-dialog-open
value syntax source: boolean-attribute
description: Whether the dialog box is showing
source: attributes-3

attribute-context-optimum-meter
type: HTML attribute applicability and value context
attribute definition: optimum attribute
global attribute: false
applies to: meter element
value syntax text: Valid floating-point number*
definition source: attr-meter-optimum
value syntax source: valid-floating-point-number
description: Optimum value in gauge
source: attributes-3

attribute-context-pattern-input
type: HTML attribute applicability and value context
attribute definition: pattern attribute
global attribute: false
applies to: input element
value syntax text: Regular expression matching the JavaScript Pattern production
definition source: attr-input-pattern
value syntax source: prod-Pattern
description: Pattern to be matched by the form control's value
source: attributes-3

attribute-context-ping-a-area
type: HTML attribute applicability and value context
attribute definition: ping attribute
global attribute: false
applies to: a element
applies to: area element
value syntax text: Set of space-separated tokens consisting of valid non-empty URLs
definition source: ping
value syntax source: set-of-space-separated-tokens
value syntax source: valid-non-empty-url
description: URLs to ping
source: attributes-3

attribute-context-placeholder-input-textarea
type: HTML attribute applicability and value context
attribute definition: placeholder attribute
global attribute: false
applies to: input element
applies to: textarea element
value syntax text: Text*
definition source: attr-textarea-placeholder
definition source: attr-input-placeholder
value syntax source: attribute-text
description: User-visible label to be placed within the form control
source: attributes-3

attribute-context-playsinline-video
type: HTML attribute applicability and value context
attribute definition: playsinline attribute
global attribute: false
applies to: video element
value syntax text: Boolean attribute
definition source: attr-video-playsinline
value syntax source: boolean-attribute
description: Encourage the user agent to display video content within the element's playback area
source: attributes-3

attribute-context-popover-global
type: HTML attribute applicability and value context
attribute definition: popover attribute
global attribute: true
applies to: HTML element
value syntax text: "auto"; "manual"; "hint"; the empty string
definition source: attr-popover
value syntax source: attr-popover-auto
value syntax source: attr-popover-hint
value syntax source: attr-popover-manual
description: Makes the element a popover element
source: attributes-3

attribute-context-popovertarget-button-input
type: HTML attribute applicability and value context
attribute definition: popovertarget attribute
global attribute: false
applies to: button element
applies to: input element
value syntax text: ID*
definition source: attr-popovertarget
value syntax source: concept-id
description: Targets a popover element to toggle, show, or hide
source: attributes-3

attribute-context-popovertargetaction-button-input
type: HTML attribute applicability and value context
attribute definition: popovertargetaction attribute
global attribute: false
applies to: button element
applies to: input element
value syntax text: "toggle"; "show"; "hide"
definition source: attr-popovertargetaction
value syntax source: attr-popovertargetaction-hide
value syntax source: attr-popovertargetaction-show
value syntax source: attr-popovertargetaction-toggle
description: Indicates whether a targeted popover element is to be toggled, shown, or hidden
source: attributes-3

attribute-context-poster-video
type: HTML attribute applicability and value context
attribute definition: poster attribute
global attribute: false
applies to: video element
value syntax text: Valid non-empty URL potentially surrounded by spaces
definition source: attr-video-poster
value syntax source: valid-non-empty-url-potentially-surrounded-by-spaces
description: Poster frame to show prior to video playback
source: attributes-3

attribute-context-preload-audio-video
type: HTML attribute applicability and value context
attribute definition: preload attribute
global attribute: false
applies to: audio element
applies to: video element
value syntax text: "none"; "metadata"; "auto"; the empty string
definition source: attr-media-preload
value syntax source: attr-media-preload-auto
value syntax source: attr-media-preload-metadata
value syntax source: attr-media-preload-none
description: Hints how much buffering the media resource will likely need
source: attributes-3

attribute-context-readonly-input-textarea
type: HTML attribute applicability and value context
attribute definition: readonly attribute
global attribute: false
applies to: input element
applies to: textarea element
value syntax text: Boolean attribute
definition source: attr-textarea-readonly
definition source: attr-input-readonly
value syntax source: boolean-attribute
description: Whether to allow the value to be edited by the user
source: attributes-3

attribute-context-readonly-form-associated-custom-elements
type: HTML attribute applicability and value context
attribute definition: readonly attribute
global attribute: false
applicable participant: form-associated-custom-elements
value syntax text: Boolean attribute
value syntax source: boolean-attribute
description: Affects willValidate, plus any behavior added by the custom element author
source: attributes-3

attribute-context-referrerpolicy-a-area-iframe-img-link-script
type: HTML attribute applicability and value context
attribute definition: referrerpolicy attribute
global attribute: false
applies to: a element
applies to: area element
applies to: iframe element
applies to: img element
applies to: link element
applies to: script element
value syntax text: Referrer policy
definition source: attr-img-referrerpolicy
definition source: attr-iframe-referrerpolicy
definition source: attr-hyperlink-referrerpolicy
definition source: attr-script-referrerpolicy
definition source: attr-link-referrerpolicy
value syntax source: referrer-policy
description: Referrer policy for fetches initiated by the element
source: attributes-3

attribute-context-rel-a-area
type: HTML attribute applicability and value context
attribute definition: rel attribute
global attribute: false
applies to: a element
applies to: area element
value syntax text: Unordered set of unique space-separated tokens*
definition source: attr-hyperlink-rel
value syntax source: unordered-set-of-unique-space-separated-tokens
description: Relationship between the location in the document containing the hyperlink and the destination resource
source: attributes-3

attribute-context-rel-link
type: HTML attribute applicability and value context
attribute definition: rel attribute
global attribute: false
applies to: link element
value syntax text: Unordered set of unique space-separated tokens*
definition source: attr-link-rel
value syntax source: unordered-set-of-unique-space-separated-tokens
description: Relationship between the document containing the hyperlink and the destination resource
source: attributes-3

attribute-context-required-input-select-textarea
type: HTML attribute applicability and value context
attribute definition: required attribute
global attribute: false
applies to: input element
applies to: select element
applies to: textarea element
value syntax text: Boolean attribute
definition source: attr-select-required
definition source: attr-textarea-required
definition source: attr-input-required
value syntax source: boolean-attribute
description: Whether the control is required for form submission
source: attributes-3

attribute-context-reversed-ol
type: HTML attribute applicability and value context
attribute definition: reversed attribute
global attribute: false
applies to: ol element
value syntax text: Boolean attribute
definition source: attr-ol-reversed
value syntax source: boolean-attribute
description: Number the list backwards
source: attributes-3

attribute-context-rows-textarea
type: HTML attribute applicability and value context
attribute definition: rows attribute
global attribute: false
applies to: textarea element
value syntax text: Valid non-negative integer greater than zero
definition source: attr-textarea-rows
value syntax source: valid-non-negative-integer
description: Number of lines to show
source: attributes-3

attribute-context-rowspan-td-th
type: HTML attribute applicability and value context
attribute definition: rowspan attribute
global attribute: false
applies to: td element
applies to: th element
value syntax text: Valid non-negative integer
definition source: attr-tdth-rowspan
value syntax source: valid-non-negative-integer
description: Number of rows that the cell is to span
source: attributes-3

attribute-context-sandbox-iframe
type: HTML attribute applicability and value context
attribute definition: sandbox attribute
global attribute: false
applies to: iframe element
value syntax text: Unordered set of unique space-separated tokens, ASCII case-insensitive, consisting of "allow-downloads""allow-forms""allow-modals""allow-orientation-lock""allow-pointer-lock""allow-popups""allow-popups-to-escape-sandbox""allow-presentation""allow-same-origin""allow-scripts""allow-top-navigation""allow-top-navigation-by-user-activation""allow-top-navigation-to-custom-protocols"
definition source: attr-iframe-sandbox
value syntax source: attr-iframe-sandbox-allow-downloads
value syntax source: attr-iframe-sandbox-allow-forms
value syntax source: attr-iframe-sandbox-allow-modals
value syntax source: attr-iframe-sandbox-allow-orientation-lock
value syntax source: attr-iframe-sandbox-allow-pointer-lock
value syntax source: attr-iframe-sandbox-allow-popups
value syntax source: attr-iframe-sandbox-allow-popups-to-escape-sandbox
value syntax source: attr-iframe-sandbox-allow-presentation
value syntax source: attr-iframe-sandbox-allow-same-origin
value syntax source: attr-iframe-sandbox-allow-scripts
value syntax source: attr-iframe-sandbox-allow-top-navigation
value syntax source: attr-iframe-sandbox-allow-top-navigation-by-user-activation
value syntax source: attr-iframe-sandbox-allow-top-navigation-to-custom-protocols
value syntax source: unordered-set-of-unique-space-separated-tokens
value syntax source: ascii-case-insensitive
description: Security rules for nested content
source: attributes-3

attribute-context-scope-th
type: HTML attribute applicability and value context
attribute definition: scope attribute
global attribute: false
applies to: th element
value syntax text: "row"; "col"; "rowgroup"; "colgroup"
definition source: attr-th-scope
value syntax source: attr-th-scope-col
value syntax source: attr-th-scope-colgroup
value syntax source: attr-th-scope-row
value syntax source: attr-th-scope-rowgroup
description: Specifies which cells the header cell applies to
source: attributes-3

attribute-context-selected-option
type: HTML attribute applicability and value context
attribute definition: selected attribute
global attribute: false
applies to: option element
value syntax text: Boolean attribute
definition source: attr-option-selected
value syntax source: boolean-attribute
description: Whether the option is selected by default
source: attributes-3

attribute-context-shadowrootclonable-template
type: HTML attribute applicability and value context
attribute definition: shadowrootclonable attribute
global attribute: false
applies to: template element
value syntax text: Boolean attribute
definition source: attr-template-shadowrootclonable
value syntax source: boolean-attribute
description: Sets clonable on a declarative shadow root
source: attributes-3

attribute-context-shadowrootcustomelementregistry-template
type: HTML attribute applicability and value context
attribute definition: shadowrootcustomelementregistry attribute
global attribute: false
applies to: template element
value syntax text: Boolean attribute
definition source: attr-template-shadowrootcustomelementregistry
value syntax source: boolean-attribute
description: Enables declarative shadow roots to indicate they will use a custom element registry
source: attributes-3

attribute-context-shadowrootdelegatesfocus-template
type: HTML attribute applicability and value context
attribute definition: shadowrootdelegatesfocus attribute
global attribute: false
applies to: template element
value syntax text: Boolean attribute
definition source: attr-template-shadowrootdelegatesfocus
value syntax source: boolean-attribute
description: Sets delegates focus on a declarative shadow root
source: attributes-3

attribute-context-shadowrootmode-template
type: HTML attribute applicability and value context
attribute definition: shadowrootmode attribute
global attribute: false
applies to: template element
value syntax text: "open"; "closed"
definition source: attr-template-shadowrootmode
description: Enables streaming declarative shadow roots
source: attributes-3

attribute-context-shadowrootserializable-template
type: HTML attribute applicability and value context
attribute definition: shadowrootserializable attribute
global attribute: false
applies to: template element
value syntax text: Boolean attribute
definition source: attr-template-shadowrootserializable
value syntax source: boolean-attribute
description: Sets serializable on a declarative shadow root
source: attributes-3

attribute-context-shadowrootslotassignment-template
type: HTML attribute applicability and value context
attribute definition: shadowrootslotassignment attribute
global attribute: false
applies to: template element
value syntax text: "named"; "manual"
definition source: attr-template-shadowrootslotassignment
description: Sets slot assignment on a declarative shadow root
source: attributes-3

attribute-context-shape-area
type: HTML attribute applicability and value context
attribute definition: shape attribute
global attribute: false
applies to: area element
value syntax text: "circle"; "default"; "poly"; "rect"
definition source: attr-area-shape
value syntax source: attr-area-shape-keyword-circle
value syntax source: attr-area-shape-keyword-default
value syntax source: attr-area-shape-keyword-poly
value syntax source: attr-area-shape-keyword-rect
description: The kind of shape to be created in an image map
source: attributes-3

attribute-context-size-input-select
type: HTML attribute applicability and value context
attribute definition: size attribute
global attribute: false
applies to: input element
applies to: select element
value syntax text: Valid non-negative integer greater than zero
definition source: attr-select-size
definition source: attr-input-size
value syntax source: valid-non-negative-integer
description: Size of the control
source: attributes-3

attribute-context-sizes-link
type: HTML attribute applicability and value context
attribute definition: sizes attribute
global attribute: false
applies to: link element
value syntax text: Unordered set of unique space-separated tokens, ASCII case-insensitive, consisting of sizes*
definition source: attr-link-sizes
value syntax source: unordered-set-of-unique-space-separated-tokens
value syntax source: ascii-case-insensitive
description: Sizes of the icons (for rel="icon")
source: attributes-3

attribute-context-sizes-img-source
type: HTML attribute applicability and value context
attribute definition: sizes attribute
global attribute: false
applies to: img element
applies to: source element
value syntax text: Valid source size list
definition source: attr-img-sizes
definition source: attr-source-sizes
value syntax source: valid-source-size-list
description: Image sizes for different page layouts
source: attributes-3

attribute-context-slot-global
type: HTML attribute applicability and value context
attribute definition: slot attribute
global attribute: true
applies to: HTML element
value syntax text: Text
definition source: the-id-attribute
value syntax source: attribute-text
description: The element's desired slot
source: attributes-3

attribute-context-span-col-colgroup
type: HTML attribute applicability and value context
attribute definition: span attribute
global attribute: false
applies to: col element
applies to: colgroup element
value syntax text: Valid non-negative integer greater than zero
definition source: attr-col-span
definition source: attr-colgroup-span
value syntax source: valid-non-negative-integer
description: Number of columns spanned by the element
source: attributes-3

attribute-context-spellcheck-global
type: HTML attribute applicability and value context
attribute definition: spellcheck attribute
global attribute: true
applies to: HTML element
value syntax text: "true"; "false"; the empty string
definition source: attr-spellcheck
value syntax source: attr-spellcheck-false
value syntax source: attr-spellcheck-true
description: Whether the element is to have its spelling and grammar checked
source: attributes-3

attribute-context-src-audio-embed-iframe-img-input-script-source-track-video
type: HTML attribute applicability and value context
attribute definition: src attribute
global attribute: false
applies to: audio element
applies to: embed element
applies to: iframe element
applies to: img element
applies to: input element
applies to: script element
applies to: source element
applies to: track element
applies to: video element
value syntax text: Valid non-empty URL potentially surrounded by spaces
definition source: attr-img-src
definition source: attr-source-src
definition source: attr-embed-src
definition source: attr-iframe-src
definition source: attr-input-src
definition source: attr-media-src
definition source: attr-track-src
definition source: attr-script-src
value syntax source: valid-non-empty-url-potentially-surrounded-by-spaces
description: Address of the resource
source: attributes-3

attribute-context-srcdoc-iframe
type: HTML attribute applicability and value context
attribute definition: srcdoc attribute
global attribute: false
applies to: iframe element
value syntax text: The source of an iframe srcdoc document*
definition source: attr-iframe-srcdoc
value syntax source: an-iframe-srcdoc-document
description: A document to render in the iframe
source: attributes-3

attribute-context-srclang-track
type: HTML attribute applicability and value context
attribute definition: srclang attribute
global attribute: false
applies to: track element
value syntax text: Valid BCP 47 language tag
definition source: attr-track-srclang
description: Language of the text track
source: attributes-3

attribute-context-srcset-img-source
type: HTML attribute applicability and value context
attribute definition: srcset attribute
global attribute: false
applies to: img element
applies to: source element
value syntax text: Comma-separated list of image candidate strings
definition source: attr-img-srcset
definition source: attr-source-srcset
value syntax source: image-candidate-string
description: Images to use in different situations, e.g., high-resolution displays, small monitors, etc.
source: attributes-3

attribute-context-start-ol
type: HTML attribute applicability and value context
attribute definition: start attribute
global attribute: false
applies to: ol element
value syntax text: Valid integer
definition source: attr-ol-start
value syntax source: valid-integer
description: Starting value of the list
source: attributes-3

attribute-context-step-input
type: HTML attribute applicability and value context
attribute definition: step attribute
global attribute: false
applies to: input element
value syntax text: Valid floating-point number greater than zero, or "any"
definition source: attr-input-step
value syntax source: valid-floating-point-number
description: Granularity to be matched by the form control's value
source: attributes-3

attribute-context-style-global
type: HTML attribute applicability and value context
attribute definition: style attribute
global attribute: true
applies to: HTML element
value syntax text: CSS declarations*
definition source: attr-style
description: Presentational and formatting instructions
source: attributes-3

attribute-context-tabindex-global
type: HTML attribute applicability and value context
attribute definition: tabindex attribute
global attribute: true
applies to: HTML element
value syntax text: Valid integer
definition source: attr-tabindex
value syntax source: valid-integer
description: Whether the element is focusable and sequentially focusable, and the relative order of the element for the purposes of sequential focus navigation
source: attributes-3

attribute-context-target-a-area
type: HTML attribute applicability and value context
attribute definition: target attribute
global attribute: false
applies to: a element
applies to: area element
value syntax text: Valid navigable target name or keyword
definition source: attr-hyperlink-target
value syntax source: valid-navigable-target-name-or-keyword
description: Navigable for hyperlink navigation
source: attributes-3

attribute-context-target-base
type: HTML attribute applicability and value context
attribute definition: target attribute
global attribute: false
applies to: base element
value syntax text: Valid navigable target name or keyword
definition source: attr-base-target
value syntax source: valid-navigable-target-name-or-keyword
description: Default navigable for hyperlink navigation and form submission
source: attributes-3

attribute-context-target-form
type: HTML attribute applicability and value context
attribute definition: target attribute
global attribute: false
applies to: form element
value syntax text: Valid navigable target name or keyword
definition source: attr-fs-target
value syntax source: valid-navigable-target-name-or-keyword
description: Navigable for form submission
source: attributes-3

attribute-context-title-global
type: HTML attribute applicability and value context
attribute definition: title attribute
global attribute: true
applies to: HTML element
value syntax text: Text
definition source: attr-title
value syntax source: attribute-text
description: Advisory information for the element
source: attributes-3

attribute-context-title-abbr-dfn
type: HTML attribute applicability and value context
attribute definition: title attribute
global attribute: false
applies to: abbr element
applies to: dfn element
value syntax text: Text
definition source: attr-abbr-title
definition source: attr-dfn-title
value syntax source: attribute-text
description: Full term or expansion of abbreviation
source: attributes-3

attribute-context-title-input
type: HTML attribute applicability and value context
attribute definition: title attribute
global attribute: false
applies to: input element
value syntax text: Text
definition source: attr-input-title
value syntax source: attribute-text
description: Description of pattern (when used with pattern attribute)
source: attributes-3

attribute-context-title-link
type: HTML attribute applicability and value context
attribute definition: title attribute
global attribute: false
applies to: link element
value syntax text: Text
definition source: attr-link-title
value syntax source: attribute-text
description: Title of the link
source: attributes-3

attribute-context-title-link-style
type: HTML attribute applicability and value context
attribute definition: title attribute
global attribute: false
applies to: link element
applies to: style element
value syntax text: Text
definition source: attr-link-title
definition source: attr-style-title
value syntax source: attribute-text
description: CSS style sheet set name
source: attributes-3

attribute-context-translate-global
type: HTML attribute applicability and value context
attribute definition: translate attribute
global attribute: true
applies to: HTML element
value syntax text: "yes"; "no"; the empty string
definition source: attr-translate
description: Whether the element is to be translated when the page is localized
source: attributes-3

attribute-context-type-a-link
type: HTML attribute applicability and value context
attribute definition: type attribute
global attribute: false
applies to: a element
applies to: link element
value syntax text: Valid MIME type string
definition source: attr-hyperlink-type
definition source: attr-link-type
value syntax source: valid-mime-type
description: Hint for the type of the referenced resource
source: attributes-3

attribute-context-type-button
type: HTML attribute applicability and value context
attribute definition: type attribute
global attribute: false
applies to: button element
value syntax text: "submit"; "reset"; "button"
definition source: attr-button-type
value syntax source: attr-button-type-button
value syntax source: attr-button-type-reset
value syntax source: attr-button-type-submit
description: Type of button
source: attributes-3

attribute-context-type-embed-object-source
type: HTML attribute applicability and value context
attribute definition: type attribute
global attribute: false
applies to: embed element
applies to: object element
applies to: source element
value syntax text: Valid MIME type string
definition source: attr-source-type
definition source: attr-embed-type
definition source: attr-object-type
value syntax source: valid-mime-type
description: Type of embedded resource
source: attributes-3

attribute-context-type-input
type: HTML attribute applicability and value context
attribute definition: type attribute
global attribute: false
applies to: input element
value syntax text: input type keyword
definition source: attr-input-type
value syntax source: attr-input-type
description: Type of form control
source: attributes-3

attribute-context-type-ol
type: HTML attribute applicability and value context
attribute definition: type attribute
global attribute: false
applies to: ol element
value syntax text: "1"; "a"; "A"; "i"; "I"
definition source: attr-ol-type
value syntax source: attr-ol-type-keyword-decimal
value syntax source: attr-ol-type-keyword-lower-alpha
value syntax source: attr-ol-type-keyword-lower-roman
value syntax source: attr-ol-type-keyword-upper-alpha
value syntax source: attr-ol-type-keyword-upper-roman
description: Kind of list marker
source: attributes-3

attribute-context-type-script
type: HTML attribute applicability and value context
attribute definition: type attribute
global attribute: false
applies to: script element
value syntax text: "module"; "importmap"; "speculationrules"; a valid MIME type string that is not a JavaScript MIME type essence match
definition source: attr-script-type
value syntax source: javascript-mime-type-essence-match
value syntax source: valid-mime-type
description: Type of script
source: attributes-3

attribute-context-usemap-img
type: HTML attribute applicability and value context
attribute definition: usemap attribute
global attribute: false
applies to: img element
value syntax text: Valid hash-name reference*
definition source: attr-hyperlink-usemap
value syntax source: valid-hash-name-reference
description: Name of image map to use
source: attributes-3

attribute-context-value-button-option
type: HTML attribute applicability and value context
attribute definition: value attribute
global attribute: false
applies to: button element
applies to: option element
value syntax text: Text
definition source: attr-button-value
definition source: attr-option-value
value syntax source: attribute-text
description: Value to be used for form submission
source: attributes-3

attribute-context-value-data
type: HTML attribute applicability and value context
attribute definition: value attribute
global attribute: false
applies to: data element
value syntax text: Text*
definition source: attr-data-value
value syntax source: attribute-text
description: Machine-readable value
source: attributes-3

attribute-context-value-input
type: HTML attribute applicability and value context
attribute definition: value attribute
global attribute: false
applies to: input element
value syntax text: Varies*
definition source: attr-input-value
description: Value of the form control
source: attributes-3

attribute-context-value-li
type: HTML attribute applicability and value context
attribute definition: value attribute
global attribute: false
applies to: li element
value syntax text: Valid integer
definition source: attr-li-value
value syntax source: valid-integer
description: Ordinal value of the list item
source: attributes-3

attribute-context-value-meter-progress
type: HTML attribute applicability and value context
attribute definition: value attribute
global attribute: false
applies to: meter element
applies to: progress element
value syntax text: Valid floating-point number
definition source: attr-meter-value
definition source: attr-progress-value
value syntax source: valid-floating-point-number
description: Current value of the element
source: attributes-3

attribute-context-width-canvas-embed-iframe-img-input-object-source-video
type: HTML attribute applicability and value context
attribute definition: width attribute
global attribute: false
applies to: canvas element
applies to: embed element
applies to: iframe element
applies to: img element
applies to: input element
applies to: object element
applies to: source element
applies to: video element
value syntax text: Valid non-negative integer
definition source: attr-canvas-width
definition source: attr-dim-width
value syntax source: valid-non-negative-integer
description: Horizontal dimension
source: attributes-3

attribute-context-wrap-textarea
type: HTML attribute applicability and value context
attribute definition: wrap attribute
global attribute: false
applies to: textarea element
value syntax text: "soft"; "hard"
definition source: attr-textarea-wrap
value syntax source: attr-textarea-wrap-hard
value syntax source: attr-textarea-wrap-soft
description: How the value of the form control is to be wrapped for form submission
source: attributes-3

attribute-context-writingsuggestions-global
type: HTML attribute applicability and value context
attribute definition: writingsuggestions attribute
global attribute: true
applies to: HTML element
value syntax text: "true"; "false"; the empty string
definition source: attr-writingsuggestions
value syntax source: attr-writingsuggestions-false
value syntax source: attr-writingsuggestions-true
description: Whether the element can offer writing suggestions or not.
source: attributes-3

condition-interactive-a
type: conditional category membership
source: interactive-content-2
classified element class: a element
category: interactive content
condition text: if the href attribute is present
index notation: a (if the href attribute is present)

condition-flow-area
type: conditional category membership
source: flow-content-2
classified element class: area element
category: flow content
condition text: if it is a descendant of a map element
index notation: area (if it is a descendant of a map element)

condition-phrasing-area
type: conditional category membership
source: phrasing-content-2
classified element class: area element
category: phrasing content
condition text: if it is a descendant of a map element
index notation: area (if it is a descendant of a map element)

condition-interactive-audio
type: conditional category membership
source: interactive-content-2
classified element class: audio element
category: interactive content
condition text: if the controls attribute is present
index notation: audio (if the controls attribute is present)

condition-palpable-audio
type: conditional category membership
source: palpable-content-2
classified element class: audio element
category: palpable content
condition text: if the controls attribute is present
index notation: audio (if the controls attribute is present)

condition-palpable-dl
type: conditional category membership
source: palpable-content-2
classified element class: dl element
category: palpable content
condition text: if the element's children include at least one name-value group
index notation: dl (if the element's children include at least one name-value group)

condition-interactive-img
type: conditional category membership
source: interactive-content-2
classified element class: img element
category: interactive content
condition text: if the usemap or controls attribute is present
index notation: img (if the usemap or controls attribute is present)

condition-interactive-input
type: conditional category membership
source: interactive-content-2
classified element class: input element
category: interactive content
condition text: if the type attribute is not in the Hidden state
index notation: input (if the type attribute is not in the Hidden state)

condition-palpable-input
type: conditional category membership
source: palpable-content-2
classified element class: input element
category: palpable content
condition text: if the type attribute is not in the Hidden state
index notation: input (if the type attribute is not in the Hidden state)

condition-flow-link
type: conditional category membership
source: flow-content-2
classified element class: link element
category: flow content
condition text: if it is allowed in the body
index notation: link (if it is allowed in the body)

condition-phrasing-link
type: conditional category membership
source: phrasing-content-2
classified element class: link element
category: phrasing content
condition text: if it is allowed in the body
index notation: link (if it is allowed in the body)

condition-flow-main
type: conditional category membership
source: flow-content-2
classified element class: main element
category: flow content
condition text: if it is a hierarchically correct main element
index notation: main (if it is a hierarchically correct main element)

condition-palpable-menu
type: conditional category membership
source: palpable-content-2
classified element class: menu element
category: palpable content
condition text: if the element's children include at least one li element
index notation: menu (if the element's children include at least one li element)

condition-flow-meta
type: conditional category membership
source: flow-content-2
classified element class: meta element
category: flow content
condition text: if the itemprop attribute is present
index notation: meta (if the itemprop attribute is present)

condition-phrasing-meta
type: conditional category membership
source: phrasing-content-2
classified element class: meta element
category: phrasing content
condition text: if the itemprop attribute is present
index notation: meta (if the itemprop attribute is present)

condition-interactive-object
type: conditional category membership
source: the-object-element
classified element class: object element
category: interactive content
index notation: interactive*

condition-palpable-ol
type: conditional category membership
source: palpable-content-2
classified element class: ol element
category: palpable content
condition text: if the element's children include at least one li element
index notation: ol (if the element's children include at least one li element)

condition-interactive-th
type: conditional category membership
source: the-th-element
classified element class: th element
category: interactive content
index notation: interactive*

condition-palpable-ul
type: conditional category membership
source: palpable-content-2
classified element class: ul element
category: palpable content
condition text: if the element's children include at least one li element
index notation: ul (if the element's children include at least one li element)

condition-interactive-video
type: conditional category membership
source: interactive-content-2
classified element class: video element
category: interactive content
condition text: if the controls attribute is present
index notation: video (if the controls attribute is present)

condition-palpable-text
type: conditional category membership
source: palpable-content-2
classified element class: text node
category: palpable content
condition text: that is not inter-element whitespace
index notation: Text that is not inter-element whitespace