# HTML Attributes
#
# Format:
#  Lines prefixed with `#` are comments, uninterpreted
#  Lines matching ([A-Z]+) `::` ALL (except: tags)? define groups of tags
#  Comma delimited columns: name, tags, description, flags
#  Tags marked with asterisk (*): attribute is for style purposes only.
#
# Flag codes:
# U :: Currently undefined by our HTML parser provider

# Sources
#  https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes
#  https://html.spec.whatwg.org/
#  https://www.w3.org/TR/xhtml11/
#  https://www.w3.org/TR/html4/
#  https://www.w3schools.com/tags/ref_attributes.asp

CORE :: ALL except: base head html meta param script style title
class       ,*CORE
id          ,*CORE a
style       ,*CORE
hidden      ,*CORE, hidden element
title       ,CORE, extra title

LANG :: ALL except: base br frame frameset hr iframe param
dir         ,LANG, Text direction; ltr or rtl
lang        ,LANG, language_code; also xml:lang

GLOBAL :: ALL except:
base        ,GLOBAL, inherited from xml:base (deprecated)

# Meta tag attributes
http-equiv  ,meta, HTTP Header name
content     ,meta, text
scheme      ,meta, format URI

# Anchor and link attributes
charset     ,a link meta, encoding of link or (meta) document
coords      ,*a, coordinates; i.e. image map
hreflang    ,a link, language_code of referent
href        ,a base link, URL
media       ,a area link
name        ,a param, section_name anchor
rel         ,a link
rev         ,a link
shape       ,*a
target      ,*a *base *link
type        ,a link embed object source

# Image and some frame attributes
src         ,frame img audio embed source
data        ,object
alt         ,img area input
height      ,img picture embed video svg *tr *th *td *iframe *object
width       ,img picture embed video svg *table *tr *th *td *iframe *object
decoding    ,img, preferred method to decode, U
# Table specific attributes
abbr        ,tr th
align       ,table tbody tfoot thead tr td th iframe object
axis        ,tr th
bgcolor     ,*table *tbody *tfoot *tr *td *th *col *colgroup *body
border      ,*table *img *object
cellpadding ,*table
cellspacing ,*table
char        ,*tr *td *th
charoff     ,*tr *td *th
colspan     ,tr td th
frame       ,*table
headers     ,tr td
nowrap      ,*tr *td *th
rowspan     ,tr td th
rules       ,*table
scope       ,tr td th
span        ,col colgroup
summary     ,table
valign      ,*tr *td
value       ,data param

# Purposefully omitted
# -- The event attributes on*, onmouse*, onkey*, etc.
# -- data-*

accept      ,form input, (file) types accepted
accept-charset ,form

cite        ,blockquote del ins q

color       ,*basefont *font *hr
controls    ,*audio *video
datetime    ,del ins time
label       ,option optgroup