Integration of Oracle RDF and Enterprise Search

Hi,
Has anyone tried integrating Enterprise Search with the new RDF feature to enable true semantic search?

It would be interesting to hear from people who have tried this in an application.
As an FYI, using RDF query capabilities in Oracle, simple PL/SQL code can be written to do this. Consider search based on a query term X. SDO_RDF_MATCH can be used to find all terms related to X in a given ontology/RDF data set. All these terms can then be used in the 'Contains' operator that is part of Oracle Text, to find all documents in a table that contain any of those terms. We have some sample code to do this, if you are interested write to me at melliyal <dot> annamalai <at> oracle <dot> com. Tighter integration is being planned in a future release as well.
RDF queries can be also combined with other relational queries. An example in Oracle of simple SQL to combine querying RDF with a relational query is as follows:
SELECT emp1.name, emp1.salary
FROM emp1, TABLE(SDO_RDF_MATCH(
'(?name :fatherOf :Matt)',
SDO_RDF_Models('family'),
null,
SDO_RDF_Aliases(SDO_RDF_Alias('','http://www.example.org/family/')),
null)) t where emp1.name=t.name;
The father of Matt is found by querying the family model (represented using RDF) using SDO_RDF_MATCH, and his salary is found out by doing a join with the table emp. Since the output of SDO_RDF_MATCH is a table, it can be easily joined with other relational data.

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