[topicmapmail] tm4j / tolog / query for occurrences

[Lars Marius Garshol]

* Tobias Redmann
>
> I want to get all Topics of a TopicMap by given occurrence (e.g.  
> http://www.mydomain.org).
>
> I tried to following:
>
> select
>     $TOPIC
> from
>   occurrence($TOPIC, $OCC),
>   resource($OCC, "http://www.mydomain.org")
> ?

Your query is correct, and would work on the OKS. (If you download  
OKS Samplers you can try for yourself.) I think the problem is that  
TM4J only supports the first tolog version, which only supported  
querying by associations (of known types).

It's not terribly hard to extend the tolog support in TM4J to add the  
missing predicates, but somebody needs to sit down and do it...

--
Lars Marius Garshol, Ontopian               http://www.ontopia.net
+47 98 21 55 50                             http://www.garshol.priv.no