How to use levels in RDF Data Model?

Question

I am working on RDF model, i am able to retrieve the queries base on subject or object....
i want to retrieve the data based on level. i could not get the query for that.
would you please advice me regarding solving this issue.
Thanks in Advance
Kamraj

Answer 1

Thanks for your response.
We are using Oracle Spatial RDF (Resource Description Framework).
We are able to retrieve the query based on Subject, Predicate and Object.
SELECT X,Y,Z
FROM TABLE(SDO_RDF_MATCH(
'(?X ?Y ?Z)',
SDO_RDF_MODELS('TESTDATASET'),
NULL,
SDO_RDF_ALIASES(SDO_RDF_ALIAS('',':')),
NULL))
WHERE( Y=':INDIRECT'OR O R Y=':DIRECT')
ORDER BY Y
We want to retrieve the triple (Subject, Predicate and Object) up to some level.
SELECT X,Y,Z
FROM TABLE(SDO_RDF_MATCH(
'(?X ?Y ?Z)',
SDO_RDF_MODELS('TESTDATASET'),
NULL,
SDO_RDF_ALIASES(SDO_RDF_ALIAS('',':')),
NULL))
WHERE( Y=':INDIRECT'OR O R Y=':DIRECT')
< level =5> -- want proper query to get the level
ORDER BY Y
Would you please help us to get the level based triples?.