search

djogopatrao / SPARQLFederator

Expand SPARQL queries to perform inference on multiple endpoints and relational databases.
8 stars 1 forks source link

implement strategy for query loader #10

Open djogopatrao opened 10 years ago

djogopatrao commented 10 years ago

nowadays, only a list of classes is allowed as an input query; upon specification of -query_type sparql, it would accept an sparql query instead.

implementing strategy, we would easily expand this for other query formats.

djogopatrao commented 10 years ago

one possible query input format is dlquery

https://github.com/owlcs/owlapi/blob/master/contract/src/test/java/org/coode/owlapi/examples/DLQueryExample.java

djogopatrao commented 9 years ago

in the current commit ( 307f82b ), stuff like (live_example_property) query: prop some E and A domain: B,C subclassof A F subclassof E D subclassof (prop some G)

renders a query specifiying service endpoint1 { prop some E union prop some F }, which may be correct. however, this expansion is being done at QueryExpander.createPatternFromRestriction, failing to check existence of subclasses of E in this endpoint (or others endpoints!).

this inference should be integrated at createPatternFromClasses. there is an underlying pattern between somevaluesfrom and rdf:type that can be used to simplify and generalize the whole algorithm.

I'm commiting as is, so the idea is not lost.