RE: [TM4J-users] exporting subject indicators

[Kal A. <ka...@te...>]

Hi Conal,

It definitely has to be a <subjectIndicatorRef> element. The <topicRef>
element won't add the subjectIndicator property to your topic. 

My advice would be to make it absolutely explicit in your input pipeline
that you are creating subject indicators and make full URIs:

<topic id="foo">
  <subjectIdentity>
    <subjectIndicatorRef
xlink:href="http://nztec.org/tm/harvest/xtm/nztec-ontology.xtm#foo"/>
  </subjectIdentity>
</topic>

It may seem like a bit of overkill, but its the most robust way to
ensure that what you mean is what is read by the XTM parser !

Cheers,

Kal


On Mon, 2004-09-27 at 08:52, Conal Tuohy wrote:
> Thanks for the prompt reply Kal! I'm really grateful for your help.
> 
> I'll bet that's it. No I don't have <subjectIndicatorRef> elements in my
> source.
> 
> I'm not using TMHarvest at present ... I'm using Cocoon pipelines with XSLT
> to harvest the topics. On the bright side, this makes it easy to add a
> subjectIndicator as a separate pipeline stage. If I understand you
> correctly, I would just need to add a <subjectIdentity> to my topics,
> pointing at themselves? It sounds a bit weird ... maybe I've misunderstood.
> 
> <topic id="foo"/>
> 
> would become
> 
> <topic id="foo">
> 	<subjectIdentity>
> 		<subjectIndicatorRef xlink:href="#foo"/>
> 	</subjectIdentity>
> </topic>
> 
> or maybe <topicRef> is better
> 
> <topic id="foo">
> 	<subjectIdentity>
> 		<topicRef xlink:href="#foo"/>
> 	</subjectIdentity>
> </topic>
> 
> Is that it?
> 
> Cheers
> 
> Con
> 
> > Do your input topic maps have <subjectIndicator> elements in
> > them ? (or
> > if you are harvesting them using TMHarvest, do you set the
> > subjectIndicator property) ? My guess is that you are only setting the
> > sourceLocator property. So your topic with the id pdf-file
> > gets a source
> > locator
> > http://www.nztec.org/tm/harvest/xtm/nztec-ontology.xtm#pdf-file,
> > but does not get a subjectIndicator. By default, the XTM
> > exporter tries
> > to be "clever" and if you export a TM with a base locator
> > http://foo.xtm
> > then all source locators of the format http://foo.xtm#bar get exported
> > as an ID attribute with the value bar.
> >
> > The merging works in memory because if topic A has
> > sourceLocator foo and
> > topic B has a subjectIndicator foo, then the topics must be
> > merged. When
> > you round trip to external files, however you will lose that
> > sourceLocator.
> >
> > My advice is to explicitly set the subject indicators in your ontology
> > topic map.
> 
> 
> 
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-- 
Kal Ahmed <ka...@te...>
techquila