Henri Sivonen wrote:
On Jan 14, 2010, at 12:04, Julian Reschke wrote:
So, for instance, extending the language schema (be it DTD or whatever) or XML
namespaces are *examples* for these kind of extensibility.
The schema for HTML5 is expressed in English and the schema already has an
extensibility point that is more versatile than DTDs:
http://www.whatwg.org/specs/web-apps/current-work/#other-applicable-specifications
Yes, that's an extension point. Hopefully we can agree that extensions
using it aren't "second-class", though.
What's missing is a mechanism through which a document can declare which
extensions it uses, so that a validator can actually check that.
Best regards, Julian
