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Re: XHTML2: Proposal for total separation of semantics from structure

From: Laurens Holst <lholst@students.cs.uu.nl>
Date: Wed, 31 Aug 2005 10:55:15 +0200
Message-ID: <43157073.8070108@students.cs.uu.nl>
To: www-html@w3.org

Orion Adrian schreef:
> Meta elements provide for full triplets (i.e. subject predicate and
> object) for the document. However subject is limited to files and not
> fragments.

Eh, no? Subject is specified by Ďaboutí, which can have a fragment 
identifier. It is shown in the bottom example of the property definition.


> 23.3 examples are representative of the following:
> subect = {the containing document}
> predicate = {as specified by the @property value}
> object = {the contects of the element}
> 
> 23.4 examples are a way to specify identity discretely. Rather than
> the string tomorrow, I can use the actual date. Instead of the text
> "blue" I can use a URI. This is an important need fulfilled, but still
> there are things missing.
> 
> What is missing is the ability to specify triplets like the meta
> element, but on arbitrary elements and attributes. What is not made
> clear to me is whether or not meta elements can be placed anywhere.
> The examples are not clear enough for me to figure that out.

I agree with that. I am also uncertain as to whether the entire set of 
attributes specified in that part of the specification can be used on 
every element (so I just assume they do) (but thereís a lot of 
duplication in semantic meaning between them, so a subset would make sense).

Also with regard to the placement of meta, there is uncertainty... The 
above mentioned last example of property shows a meta element followed 
by an a element, but I do not know whether based on that I can conclude 
that it is indeed allowed to have meta in content.

Actually, I just looked at the RNG schema (with my limited knowledge of 
RNG), and it seems meta is indeed allowed anywhere in the content. Same 
for the metainformation attributes.

Another weirdness that I found by the way is with regard to the title 
element: the "Every XHTML document must have a title element in the head 
section." requirement. This must be equivalent to <h1 
property="title">Something</h1>, as an example that follows is showing 
(using meta). However, thatís pointless as long as the mentioned 
requirement is there.


~Grauw

-- 
Ushiko-san! Kimi wa doushite, Ushiko-san nan da!!
Received on Wednesday, 31 August 2005 08:56:10 GMT

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