Data "smushing" with 10g Spatial

Are there any functions or methods for merging properties of RDF nodes that have distinct RDF ID's but actually represent the same entity?
With other tools that provide OWL support, for example, one can define a rule that will check for specific unique properties of a node and assign owl:sameAs property to two nodes that match. This partially gets us there by at least labeling nodes that are equivilent. However, one is left to provide code that "smushes" or aggregates the properties of these two nodes and removes the redundant node.
So, my question is: Does Oracle Spatial 10g provide some way to merge node that represent the same entity, either by attaching a preprocessing method to the data import step or on-the-fly in queries?
Thanks!

Hi,
Yes, that helps. I think I am understanding you right that the cross-referenced identifier is something that comes from the application, and that the RDF store itself does not have to determine that two entities are the same by comparing other properties of the entities (because the comparison might depend on domain knowledge).
First, OWL support is planned in a future release (see Oracle 11g and changes in RDF support? With that support, the identitical entities might not be automatically identified on load, but an additional step could, through some application code, identify entities which have the same cross-referenced identifier, and add a new owl:sameAs link between the two entities.
In 10gR2 the same thing is possible by adding a user-defined property, say :identicalTo. Then define user-defined rules to relate the two entities - example:
if A :identitcalTo B, and A rdfs:subClassOf X
then
B is rdfs:subClassOf X
An inferencing step would create these relations.
However in both approaches (OWL or user-defined rules), that final magic of presenting both nodes as identical is not there - the query in application code will have to specify that - "find entities that are owl:sameAs to a given entity, or :identicalTo a given entity".
Let us discuss this offline. You can reach me by writing to me at melliyal <dot> annamalai <at> oracle <dot> com.
Melli

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