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Experimenting with EmbeddedRDF and GRDDL Support - Embedded RDF is a method of embedding (a subset of) RDF within XHTML and HTML documents. A simple XSLT transformation can be used to extract the RDF from within the document. A related and more generalised technology is GRDDL which... (13:51 | 0 Comments)

SPARQL Geo Extensions - I've been experimenting with some ARQ Extensions for manipulating geographical information in SPARQL. I've implemented three functions which are now running on this server, to use them you'll need to add the following PREFIX to your queries: PREFIX myfn: <java:com.ldodds.sparql.>... (20:55 | 0 Comments)
Applying XSLT to SPARQL Results - Using the XSLT service its possible to apply a transformation to any XML document, including the results of SPARQL queries. The Jena RDF/XML-ABBREV output which can be used to serialize the results of CONSTRUCT and DESCRIBE queries can be processed... (20:39 | 0 Comments)

Sample SPARQL Queries - Whilst putting together my local cache of useful data sources I wrote a series of SPARQL queries to exercise the data. They're all pretty trivial, but demonstrate the kinds of data available in each of the data sources as well... (14:09 | 0 Comments)

Local Mirrors of Useful RDF Data Sources - This morning I released another internal improvement to the SPARQL query service, adding the first of several caching layers to improvement performance and efficiency. The service now has local caches of a large set of useful RDF data sources including... (10:20 | 0 Comments)

SPARQL Service Updates - I've released some updates to the SPARQL query service. The code is now running on ARQ so should now be conforming to the SPARQL Candidate Recommendation. I've also fixed some bugs and issues with data set creation that was stopping... (22:02 | 0 Comments)

Simple Inference Service - I've uploaded the docs for the Simple Inference Service, so now you can play with Jena rules from the comfort of your browser window. By way of an example here are some rules that infer some FOAF metadata, specifically that... (21:26 | 0 Comments)

AJAX Client - The documentation and the latest code for the AJAX client to the SPARQL query service is now online. Hopefully the documentation should be clear enough to follow. There's actually no need to know any of the AJAX details; to use... (20:37 | 0 Comments)

SPARQL Query Service Online - The initial version of the SPARQL query service is now live. Actually its been live for a few days but I've only just finished the documentation! Read through the documentation and pointers to get started with the service. You can... (14:54 | 0 Comments)