- From: Daniel Glazman <daniel.glazman@disruptive-innovations.com>
- Date: Fri, 27 Jun 2008 14:25:36 +0200
- To: Bjoern Hoehrmann <derhoermi@gmx.net>
- Cc: "www-style@w3.org" <www-style@w3.org>
Bjoern Hoehrmann wrote:
> * Daniel Glazman wrote:
>> According to CSS 2.1 grammar [1], a |URI| token is formed this way:
>>
>> "url("{w}{string}{w}")" {return URI;}
>> "url("{w}{url}{w}")" {return URI;}
>>
>> where |url| is
>>
>> url ([!#$%&*-~]|{nonascii}|{escape})*
>>
>> Please note the |*| at the end of that line...
>> That means the following is a perfectly valid CSS 2.1 rule :
>>
>> @namespace url();
>>
>> where the parsing should produce an empty (length 0) url token !
>
> The empty string is a valid resource identifier, if it somehow causes
> problems in @namespace, then the css3-namespace specification should
> define that the @namespace rule is invalid in the case above. What am
> I missing?
The issue is not related to namespaces. The following is also perfectly
valid for the same reasons :
@import url();
foo { background-image: url(); }
The problem is that a URL is not supposed to be zero-length...
</Daniel>
Received on Friday, 27 June 2008 12:26:20 UTC