Thursday, May 26, 2005, 7:20:23 PM, Thomas Broyer wrote:
>>But then 6.3 goes on to explain how to process it. >>This sounds like a contradiction? >> >> > No, why? Ok, I'd interpreted "ignoring" it to be processing it, as opposed to failing. I'll concede that I misinterpreted that. > Say I am an Atom Processor and I find these extensions elements: > <!-- defined before: > xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#"; --> > <geo:lat>26.58</geo:lat> > <geo:long>-97.83</geo:long> > Is this something I know how to process? > * yes: this is "known foreign markup", I process it > * no: this is "unknown foreign markup", I ignore it without failing > or signaling an error So known 6.4 extensions are "known foreign markup", and unknown extensions are "unknown foreign markup"? Ok. >>Also, if 6.4 extensions are a subset of "unknown[?] foreign markup", > 6.4 extensions are not a subset of "foreign markup" or "unknown foreign > markup". 6.4 extensions are the whole "foreign markup" set 6.2 says that new elements and attributes can be added. Earlier discussion in this thread suggested that these may be inside <atom:link> elements. Isn't this a type of markup that isn't a 6.4 extension? 6.4 extensions can only appear in atom:feed, atom:entry, and Person constructs. [BUG ALERT!!!! - they should blatantly be allowed inside atom:source too, and the inheritance needs explaining] For the people who were proposing that atom:link shouldn't ban content, can they tell me which type of Section 6 markup they regard it to be? Or were they proposing that Section 6.4 should be extended to allow Link Extensions. > (except it doesn't deal with "foreign attributes", but the whole > section 6 and the whole spec doesn't deal with them). Yes it does, section 6.2 says that future versions of Atom can add new attributes. > If you read carefully the section 6.4, you'll notice that what is not a > Simple Extension Element is a Structured Extension Element. > A Simple Extension Element is an element with no attribute and is either > empty or has text-only content. > A Structured Extension Element is an element with at least an attribute > or a child. Yep, I understand Section 6.4, but these rules only apply directly inside atom:entry, atom:feed, and Person constructs [and atom:source]. Foreign markup in other places isn't 6.4 markup, so what is it? > Is there any other construct I missed? * Elements in places that they aren't banned such as atom:category, and depending on the outcome of this thread, atom:link - presumably intended for future versions of Atom. Allowed by Section 6.2. [BUG ALERT!!! The RNG says that the content is empty, the text doesn't] * Attributes on any existing elements. Allowed by Section 6.2. -- Dave
