LinkedBrainz at ESWC Summer School

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Tutorials on Linked Data, Linked Services and Ontology Design were presented at the ESWC Summer School, each using LinkedBrainz and the Music Ontology as examples. As well as the recently-released live RDFa on MusicBrainz.org, the students were given early access to a SPARQL endpoint via D2R for the purposes of group projects undertaken, with the supervision of tutors, during the week.

A very positive outcome was a promising prototype for a Last.fm extension, produced using GreaseMonkey, concerning the indirect attribution of affect to music via association to pictures with established affect.

A less positive, but extremely useful, piece of feedback from the event concerned the scalability of SPARQL querying via D2R, given the complicated nature of the NSG schema and the complexity of D2RQ rules required (many based on 3- and 4-way relational joins). It could clearly be seen that offering a public SPARQL endpoint via this route was not feasible.

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