- From: Felix Sasaki <fsasaki@w3.org>
- Date: Tue, 24 Jan 2006 14:29:15 +0900
- To: "Bjoern Hoehrmann" <derhoermi@gmx.net>
- Cc: www-style@w3.org, public-i18n-core@w3.org
> > * Felix Sasaki wrote: >>> At http://www.w3.org/International/reviews/0601-css3-selectors/ > >>> In 6.1.1, it should be made clear that the styling language (e.g. CSS) >>> must provide a prefix binding mechanism. It is also unclear what >>> effect, >>> if any, namespace declarations in the document being styled have on >>> prefixes used in the stylesheet. > >>>> #6 "A type selector containing a namespace prefix that has >>>> not been previously >>>> declared is an invalid selector. The mechanism for >>>> declaring a namespace >>>> prefix is left up to the language implementing >>>> Selectors. In CSS, such a >>>> mechanism is defined in the General Syntax module." > >> again: do you depend on css or not? > > Selectors can be successfully implemented and used without any mechanism > to bind a namespace name to a prefix. Selectors that depend on a prefix > cannot be successfully processed in this case, and the draft defines how > implementations must handle this error. It is not possible through black > box testing whether implementations support namespaced selectors or not, > since the behavior is the same if there are no prefix bindings. Any > technology that uses Selectors in some way would need to define a prefix > binding mechanism to allow authors to use prefixes in selectors. > > It does not seem very useful to require any such technology to provide > this; the technology might be constrained e.g. to trees where elements > and attributes cannot be bound to a namespace, so any selector that uses > them would match nothing. The references as cited above are just > informative notes for people looking for more information. So no, there > is no dependency on the General Syntax module. Does this clarify the > situation? IMO the situation looks like: - CSS implementations of selectors: depend on syntax module & are fine. - other implementations of selectors: if they don't use namespaces, they are fine, if not: nobody knows what should happen with namespace prefix bindings. Why is it not possible to formulate s.t. like "If selectors are used in a language which incooperates the namespace mechanisms, the following binding rules apply: ..."? Regards, Felix.
Received on Tuesday, 24 January 2006 05:29:26 UTC