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> uche.ogbuji@fourthought.com (Uche Ogbuji) writes:
> >Unsatisfactory answer (and how I do it): Use a processor that has a
> >normalize-url() or resolve-url() extension function. For example:
> >4Suite. I think Saxon has such a beast as well. In 4XSLT it's
> >resolve-url(), namespace http://xmlns.4suite.org/ext
>
> Does this work for fragments inside the same document without a separate
> retrieval call?
Yes in the general case. Yoiu would provide the base URI of the foaf:knows
lement, which is probbaly the same as the base URI of the node with the
corresponding foaf:Person.
Of couse, it would break if the user used external parsed entities or xml:base
in ways that ruined the correspondence of base URIs. But then their RDF would
probably also be broken.
> The extra-special catch comes if I have to deal with
> these documents in a pipeline where the base URI may not be meaningful.
> I guess the pipeline could also manage normalization.
As long as the base URI is consistent at the crucial stage of the pipeline,
for your case it doesn't matter precisely what that URI is.
> >I usually combine this with an xsl:key that indexes rdf:about and
> >rdf:ID. That way I can resolve fragments to full URIs and then look
> >them up easily and efficiently.
>
> I'm thinking I can make this work for simple ID-based fragment
> identifiers, at least in a context (like RDF) where I know all the IDs
> will be rdf:ID.
II thik in every case where i works OK for rdf:ID, it would work just aswell
if yuo threw in rdf:about. Blank nodes, I think, would be the wildcard. Youd
probably have to force users to use rdf:nodeId, and then create a new key on
those IDs.
--
Uche Ogbuji Fourthought, Inc.
http://uche.ogbuji.net http://4Suite.org http://fourthought.com
XML Data Bindings in Python - http://www.xml.com/pub/a/2003/06/11/py-xml.html
Introducing Examplotron - http://www-106.ibm.com/developerworks/xml/library/x-x
mptron/
Charming Jython - http://www-106.ibm.com/developerworks/java/library/j-jython.h
tml
The commons of creativity - http://www-106.ibm.com/developerworks/xml/library/x
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A custom-fit career in app development - http://www.adtmag.com/article.asp?id=7
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