HTML構文メモ

html.md

tokenization state 便覧

https://html.spec.whatwg.org/multipage/parsing.html#tokenization

state	example	備考
data	""	基本の状態
RCDATA	"<title>"	文字参照と閉じタグのみ有効
RAWTEXT	"<xmp>"	閉じタグのみ有効
script data	"<script>"	RCDATA+特別なネストルール
PLAINTEXT	"<plaintext>"	脱出は不可能
tag open	"<"
end tag open	"</"
tag name	"<a"
RCDATA less-than sign	"<title><"
RCDATA end tag open	"<title></"
RCDATA end tag name	"<title></a"
RAWTEXT less-than sign	"<xmp><"
RAWTEXT end tag open	"<xmp></"
RAWTEXT end tag name	"<xmp></a"
script data less-than sign	"<script><"
script data end tag open	"<script></"
script data end tag name	"<script></a"
script data escape start	"<script><!"
script data escape start dash	"<script><!-"
script data escaped	"<script><!-- "
script data escaped dash	"<script><!-- -"
script data escaped dash dash	"<script><!--"
script data escaped less-than sign	"<script><!--<"
script data escaped end tag open	"<script><!--</"
script data escaped end tag name	"<script><!--</a"
script data double escape start	"<script><!--<a"
script data double escaped	"<script><!--<script>"
script data double escaped dash	"<script><!--<script>-"
script data double escaped dash dash	"<script><!--<script>--"
script data double escaped less-than sign	"<script><!--<script><"
script data double escape end	"<script><!--<script></"
before attribute name	"<a "
attribute name	"<a a"
after attribute name	"<a a "
before attribute value	"<a a="
attribute value (double-quoted)	"<a a=\""
attribute value (single-quoted)	"<a a='"
attribute value (unquoted)	"<a a=a"
after attribute value (quoted)	"<a a='a'"
self-closing start tag	"<a/"
bogus comment	"<?"
markup declaration open	"<!"
comment start	"<!--"
comment start dash	"<!---"
comment	"<!-- "
comment less-than sign	"<!--<"
comment less-than sign bang	"<!--<!"
comment less-than sign bang dash	"<!--<!-"
comment less-than sign bang dash dash	"<!--<!--"
comment end dash	"<!-- -"
comment end	"<!----"
comment end bang	"<!----!"
DOCTYPE state	"<!doctype"
before DOCTYPE name	"<!doctype "
DOCTYPE name	"<!doctype a"
after DOCTYPE name	"<!doctype a "
after DOCTYPE public keyword	"<!doctype a public"
before DOCTYPE public identifier	"<!doctype a public "
DOCTYPE public identifier (double-quoted)	"<!doctype a public \""
DOCTYPE public identifier (single-quoted)	"<!doctype a public '"
after DOCTYPE public identifier	"<!doctype a public ''"
between DOCTYPE public and system identifiers	"<!doctype a public '' "
after DOCTYPE system keyword	"<!doctype a system"
before DOCTYPE system identifier	"<!doctype a system "
DOCTYPE system identifier (double-quoted)	"<!doctype a system \""
DOCTYPE system identifier (single-quoted)	"<!doctype a system '"
after DOCTYPE system identifier	"<!doctype a system ''"
bogus DOCTYPE	"<!doctype a a"
CDATA section	"<svg><![CDATA["	SVG, MathML内のみ ]]> のみ有効
CDATA section bracket	"<svg><![CDATA[]"
CDATA section end	"<svg><![CDATA[]]"
Character reference	"&"
Named character reference	"&a"
Named character reference	"&aa"
Numeric character reference	"&#"
Hexadecimal character reference start	"&#x"
Decimal character reference start	"&#1"
Hexadecimal character reference	"&#x1"
Decimal character reference	"&#1"
Numeric character reference end	"&#1;"

タグごとの違い:

種類	該当	対応する閉じタグ	文字参照	コメント	タグ	CDATA
data	以下を除くすべて	✓	✓	✓	✓	△1
RCDATA	<textarea> <title>	✓	✓
RAWTEXT	<iframe> <noembed> <noframes> <noscript>2 <style> <xmp>	✓
script data	<script>	△3
PLAINTEXT	<plaintext>

Footnotes

1. SVG, MathML内のみ ↩

2. scriptを無効化した環境では通常のタグとして扱う ↩

3. <!-- と --> で囲まれた範囲内で <script> ... </script> が対で出現した場合は、その </script> は閉じタグとしては扱わない。 ↩