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[selectors4] Non-editorial comments on the 2013-04-17 ED

From: Simon Sapin <simon.sapin@exyr.org>
Date: Sun, 21 Apr 2013 17:04:27 +0200
Message-ID: <5173FFFB.6010401@exyr.org>
To: www-style@w3.org
Hi,

Here are a few comment on the Selectors 4 ED that could lead to 
normative changes.


§6.7 "What makes attributes of type ID special is that no two such 
attributes can have the same value in a conformant document." What about 
non-conformant documents that reuse the same ID? Can ID selector ever 
match multiple elements, in practice?

§7.3 "The fragment identifier of the document URI is stripped before 
matching against the link's URI; otherwise all portions of the URI are 
considered." Shouldn’t both fragment identifiers be stripped?

Same section: "Similarly if the document's URI is not a URL, the 
pseudo-class does not match anything." That’s only in the functional 
pseudo-class case, right? By the way, what’s the difference between URI 
and URL? (Definition needed, preferably by reference.) How are URIs 
parsed? Does http://w3.org:80/ match http://w3.org/ ? I suggest 
referring to the WHATWG URL standard for parsing, and use "has a 
relative scheme"[1] instead of "URI that is an URL".

[1] http://url.spec.whatwg.org/#relative-scheme

§8.1 "User agents not that do not support interactive media do not have 
to support this pseudo-class." What does it mean to not support a 
pseudo-class? Parse as invalid (and invalidate the whole selector list) 
or parse as a valid selector that doesn’t match anything? cssselect and 
WeasyPrint currently do the latter.

§12.7 Should combinators inside :nth-match() and :nth-last-match() only 
be allowed in the Complete profile, as for :matches()?

-- 
Simon Sapin
Received on Sunday, 21 April 2013 15:04:50 UTC

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