What's behind Getty LOD/SPARQL?

[Go S]

Hello, I have 3 easy questions for the Getty team. Can somebody answer?:

1) What graph database system is behind Getty LOD/SPARQL? (i.e. Virtuoso, Blazegraph etc)

2) Is it an Open Source version or commercial version?

3) I tried to make a simple counting query on SPARQL: "select (count(*) as ?c) where { ?s ?p ?o }", but I got Results: (0) for AAT and Any. Why, and how can I make it work (alternatives perhaps?)?

Many thanks in advance,

Austrian Centre for Digital Humanities,

Austrian Academy of Sciences,

Go Sugimoto

[Getty Vocabularies LOD]

> What graph database system is behind Getty LOD/SPARQL?

GraphDB

> Is it an Open Source version or commercial version?

We use the enterprise version.

> I tried to make a simple counting query on SPARQL: "select (count(*) as ?c) where { ?s ?p ?o }"

This is a long query and might have hit the 2 minute query timeout. You can get triple counts from the descriptive info at http://vocab.getty.edu/void.ttl

Gregg Garcia

Getty Digital

[Vladimir Alexiev]

> You can get triple counts from the descriptive info at http://vocab.getty.edu/void.ttl

This is documented in http://vocab.getty.edu/doc/queries/#Counting_and_Descriptive_Info.

The full description of the available info is at http://vocab.getty.edu/doc/#Descriptive_Information.

>> I tried to make a simple counting query on SPARQL: "select (count(*) as ?c) where { ?s ?p ?o }"

> This is a long query and might have hit the 2 minute query timeout. 

Getty's currently considering an upgrade of GraphDB. You can try the test instance at http://getty.ontotext.com, which uses a recent version of GraphDB.

Your query takes a couple of minutes, then returns a count of 404M triples

Cheers!

[Go S]

Thank you very much for your information!

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