From W3C Wiki
An RDF query is a question that you ask an RDF program that knows how to navigate RDF data.
See Also RDFQuery/Ideas
Implementations of RDF Query
- What RDF query Implementations are available?
- Are there, or will there be, W3C working groups dedicated to RDF queries?
- Does RDF query relate to XML query? If so, how?
- Which RDF query languages can handle DAML+oil/OWL properties like inverse, unambiguousProperty?
- How does RDF query handle datatypes?
- Which query languages for RDF allow you to specify optional variables to bind?
- Which RDF query languages are widely deployed?
- What is an RDF query?
- How do you query a reified statement? (see RdfReification)
- How do you represent BlankNodes in RDF queries?
Capabilities of QLs
- Which RDF query languages can...
- handle RDF schema-related queries?
- do substring matches?
- All that can do regex matching
- do regex matching?
- do recursive queries?
- do template-matching queries?
- do XSLT-like queries?
- SPARQL's CONSTRUCT feature does a bit of that
How can queries be performed?
- Is there a programmatic query API? (what is a programmatic query?)
- How do I query generic RDBMS, SQL data using RDF query?
- How can I query and return provenance information in RDF query? (what is provenance information?)
- How do I represent RDF graphs in a (RDBMS, SQL) database and query them?
- There's much existing work on this to be found out there.
- Why not use an RDF graph with blanks for querying RDF? (See: GraphMatchingQuery)
Testing the Proposed Specification
We're starting to see demo services based on the SPARQL spec from the RDF Data Access WG: DawgShows.
- Are there any test suites or test cases for RDF query ?
- As it is a proposal, these cannot be written yet. However, one can attempt to implement suggestions made about the specification and report back with your findings.
- What summaries of RDF query are available?
- Are there any product-independent query languages?
- Are there any product-independent languages of any kind? Most likely it will be extended, even if a core is agreed. In light of that, one could say SQL. I suspect this is not the intended question.