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SPARQL Query Language for RDFThe 2nd draft of the SPARQL Query Language for the Resource Description Framework (RDF) was published a few days ago by the W3C's RDF Data Access Working Group (DAWG). It's very SQL-like in syntax, but the fact that the data being queried is a graph brings in a raft of issues, as do things like RDF's support for (XML Schema) typed literals alongside named classes/instances. Early implementations include Rasqal (demo - Rasqal's C source, with lots of language bindings) and ARQ for Java. There's a public mailing list for comments. Once the query language is hammered out then RDF triplestores should make a viable alternative to SQL/RDBMSs, especially for use on the Web and with other 'unstructured' data. |
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