- From: Andrei Polushin <polushin@gmail.com>
- Date: Thu, 21 Feb 2008 19:07:25 +0600
- To: www-style@w3.org
In [CSS21, 4.3.4 URLs and URIs][1]:
> Some characters appearing in an unquoted URI, such as
> parentheses, commas, whitespace characters, single quotes (')
> and double quotes ("), must be escaped with a backslash so that
> the resulting URI value is a URI token: '\(', '\)', '\,'.
### Issue 1 ###
The prose should provide some reasons for escaping ',' with a backslash.
An implementor needs to know the rationale and the intent for that.
### Issue 2 ###
Backslash character itself should be also escaped with an another
backslash, and that fact should be mentioned explicitly.
As a result of the above,
### Issue 3 ###
In [CSS21, G.2 Lexical scanner][2]:
> url ([!#$%&*-~]|{nonascii}|{escape})*
This production does not exclude comma or backslash from the range of
characters allowed in unquoted URI. Probably, it should look like:
> url ([!#$%&*+\--\[\]-~]|{nonascii}|{escape})*
(not sure, I'm not familiar with Flex).
[1]: http://www.w3.org/TR/2007/CR-CSS21-20070719/syndata.html#uri
[2]: http://www.w3.org/TR/2007/CR-CSS21-20070719/grammar.html#scanner
--
Andrei Polushin
Received on Thursday, 21 February 2008 13:07:40 UTC