We have a single "federated.owl" file that includes a number of
owl:imports referencing a wide variety of source graphs including
several physical rdf files produced from spreadsheets, xml files, text
files. We also have several D2R maps providing real-time federation
into relatational data stores as well.
Yesterday, one of those spreadsheet sources switched from a
development feed (smaller data set) to a production feed (much larger
data set). Given the data volume increase, we decided to change the
sparql motion script that processed this data source from writing a
local .rdf file to writing the generated triples into a semantic model
stored in Oracle. This load worked successfully.
We then created a "src.oracle" file that allowed us to open the new
semantic Oracle model in TopBraid Composer and we were able to view
the oracle model's classes, properties, and instances successfully.
We then opened up the "federated.owl" file and imported the new
"src.oracle" into it. After a few minutes, TopBraid Composer returned
with an error. The properties window in TopBraid Composer no longer
showed any properties (prior to importing the ".oracle" file, it
showed all the imported properties from the other imported files).
Instead, the properties window showed the following error (the dashed
line was added by me to delineate the error message in this posting):
----------------------------------------------------------------------
Operation failed.
On: Mar 29, 2011 10:41:26 AM
Reason:
org.eclipse.swt.SWTException: Failed to execute runnable
(com.hp.hpl.jena.shared.JenaException: java.sql.SQLException:
ORA-29532: Java call terminated by uncaught Java exception:
oracle.spatial.rdf.server.ParseException: Encountered "<" at line 1,
column 2.
Was expecting one of:
<URI> ...
<QNAME> ...
<VAR> ...
ORA-06512: at "MDSYS.RDF_MATCH_IMPL_T", line 203
ORA-06512: at "MDSYS.RDF_MATCH_IMPL_T", line 67
ORA-06512: at line 4
)
----------------------------------------------------------------------
If we remove the "src.oracle" import, the "federated.owl" file is fine
once again. Can you help me understand what's going on and how to
fix?
Thanks,
Phil
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