[TM4J-users] exporting subject indicators

[Conal T. <Con...@vu...>]

I recently switched from Hibernate to the In-Memory back-end and I now =
have a slight problem with persistence of subject indicators. With the =
In-Memory back-end you have to write the topic map to an XTM file to =
persist it. I THINK that all my subject indicators are in the topic map =
in memory, but are not written to my XTM, and this causes a problem next =
time I load the map.=20

My TM is built by merging a bunch of XTM files which are harvested from =
various sources, and also including some ontological topicmaps. For =
instance I have an ontology file with a base-locator of =
http://www.nzetc.org/tm/harvest/xtm/nzetc-ontology.xtm which includes =
for instance a topic with id =3D "pdf-file". When I save my central =
(merged) XTM file I get the topic written out just the same way, as a =
topic with id=3D"pdf-file", but with no<subjectIdentity>. Because the =
base locator of the merged file is different to the base locator of the =
ontology, I won't be able to refer to the same topic in a different =
file, using a full URI:
http://www.nzetc.org/tm/harvest/xtm/nzetc-ontology.xtm#pdf-file
... because this subject indicator just isn't present in the (merged) =
XTM file I save.

I've looked at the source code of the TopicMapWalker and the XTMWriter =
and it looks like it should work, but I get nothing in my output.

So long as I have Cocoon running, and my topic map in memory, then I can =
merge topic maps into it and everything is fine; the topics merge as =
they should (this is why I think the subject indicators ARE present in =
memory), but as soon as I save the merged XTM and reload it, then my =
original subject indicators are gone and everything turns to custard.

Any ideas?

Con