1 <!DOCTYPE html PUBLIC
"-//W3C//DTD HTML 4.01//EN">
4 <title>Syntax and parsing of unknown pseudo-classes
</title>
5 <style type=
"text/css">
6 p
{ background: lime
; }
7 p:subject
{ background: red
; } /* this is not valid CSS, and if UAs
8 implemented the experimental :subject pseudo-class they should have
9 used the :-vnd-ident syntax. */
11 <link rel=
"first" href=
"css3-modsel-1.html" title=
"Groups of selectors">
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"prev" href=
"css3-modsel-159.html" title=
"Syntax and parsing of new pseudo-elements">
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"next" href=
"css3-modsel-161.html" title=
"Syntax and parsing of unknown pseudo-classes and pseudo-elements">
14 <link rel=
"last" href=
"css3-modsel-d5e.html" title=
"NEGATED :indeterminate with :checked">
15 <link rel=
"up" href=
"./index.html">
16 <link rel=
"top" href=
"../../index.html">
19 <p>This line should have a green background.
</p>