9107 2010-02-21 16:28:54 +0000 Incorrectly reports validity for various illegal pseudo-element usages 2012-09-21 14:42:47 +0000 1 1 1 Unclassified CSSValidator CSS 2.1 CSS Validator PC Windows NT NEW P2 normal --- 1 cecil dave.null caribou info www-validator-cvs oldest_to_newest 32488 0 cecil 2010-02-21 16:28:54 +0000 The validator IMHO incorrectly reports validity for the following CSS 2.1 fragments (direct input entered) Case #1 : a:first-line:first-line {} Case #2 : a:first-line:lang(en) {} Case #3 : a:first-line[attr] {} Case #4 : a:first-line elem {} According to the CSS2.1 grammar in appendix G, pretty much anything goes in respect of pseudo-element placement, so if the appendix G interpretation is accepted then the validator is correct in reporting each of the above as valid. However, according to CSS2.1 section 5.2 (http://www.w3.org/TR/CSS2/selector.html#pattern-matching ) : "One pseudo-element may be appended to the last simple selector in a chain, .." My interpretation of this is (a) I take the word "appended" to mean what it says, so a pseudo-element may only be in rightmost position. I assume that (b) zero or one pseudo elements may be present, and no more, and that (c) only the rightmost simple selector may have a pseudo-element. So case #1 should fail because of my rules (a) and (b), case #2 and #3 should fail under (a), case #4 under (c). 74221 1 caribou 2012-09-21 14:29:59 +0000 From http://www.w3.org/TR/CSS2/selector.html#pseudo-elements : "Pseudo-classes are allowed anywhere in selectors while pseudo-elements may only be appended after the last simple selector of the selector." first-line is a pseudo-element, not a pseudo-class, so this is indeed a bug. 74223 2 caribou 2012-09-21 14:42:47 +0000 *** Bug 15224 has been marked as a duplicate of this bug. ***