SWADE Europe Deliverable 12.4.1 Large Scale Resource Discovery and Presentation Demonstrator by Dave Beckett

This is the demonstrator of large scale resource discovery and presentation by the means of Redland contexts to view aggregated data. The source of this data is from a webcrawl over FOAF data in early 2004. It is stored in two Redland stores - a Sleepycat/Berkeley DB one and a MySQL one, both with Redland context support. There are 700501 triples in the store for 51,323 foaf:Person entries in 5848 contexts (web page transactions).

This is the demonstrator for SWADE Europe workpackage 12.4 which is reported on in deliverable D12.4.1 including the background to Redland Contexts.

Home > Perform an RDQL query

Perform an RDQL query against the database and get back variable bindings and results.

  select ?nick, ?name where 
    (?x rdf:type foaf:Person) (?x foaf:nick ?nick) (?x foaf:name ?name)
  using foaf for <http://xmlns.com/foaf/0.1/>

  select ?home where 
    (?x foaf:name "Eric Miller") (?x foaf:homePage ?home)
  using foaf for <http://xmlns.com/foaf/0.1/>