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From David Crossley <>
Subject Re: How do you add a link tag?
Date Fri, 13 Jul 2007 02:39:45 GMT
David Crossley wrote:
> Ross Gardler wrote:
> > Oshani Seneviratne wrote:
> > >
> > >In the FOAF plugin, I was trying to make the FOAF data get
> > >auto-discovered by a tool like Semantic Radar [1]. To do that, I
> > >believe there should be a link tag, such as the following, inside the
> > >head element of the page.
> > >
> > ><link rel="meta" type="application/rdf+xml" href="foaf.rdf" />
> > >
> > >I could not find any DTD in document-v20 [2] for 'link', so I was
> > >unable to add it in the xsl which transforms the FOAF into XDoc.
> > >
> > >However, I see that some link tags are included (css files for
> > >example) in the final HTML page generated. But I couldn't figure out
> > >where those are picked up in the pipeline.
> > >
> > >So I would really appreciate any advice on what I should do to get a
> > >link tag included in a page.
> > 
> > These are added by the skinning system. Using skins there is no easy
> > way to do this since there is no (easy) way for the skin to know when
> > it should be adding the link. I'm afraid it is one of the drawbacks of
> > the skinning system. It is possible, but it is hacky and I don't
> > recommend going down that route as it will mean having to maintain a
> > new skin, which we don't want to do.
> > 
> > We could consider adding handling of the link element in XDoc (it is
> > XHTML2 compat, so is likely to be accepted by the community).
> Yes this would be fine. As said in our mail archives,
> anything that is in our xhtml subset [1] can be added
> to xdoc. We are only doing it element-by-element as they
> are needed.
> [1] $FORREST_HOME/main/main/webapp/resources/schema/relaxng/WD-xhtml2-20050527
> However i wonder if there is an issue:
> Adding it to document-v2 would be okay. As our
> internal format is document-v13, then it would also
> need to be enabled there. However we already have
> a "link" element with a different purpose.
> I can see a workaround. We don't xml validate
> the internal format, so we can inject any element
> that we need.
> I will add it to the v2 DTD.
> Meanwhile, to test you can add header/link elements
> to a document-v20 doc and exclude the relevant docs from
> validation by using config.
> Here is a patch for the skins stylesheets common and pelt:

Okay. I added that today at r555841.

The DTD changes still need to be done, so use the
validation exclusion described above.


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