Future Developments
RDF Data Access (a.k.a. Queries)

• In Python, for example, one uses:

   # do something with (p,o) pairs

   for (p,o) in triples.predicate_objects(subject) :

 	    do_something(p,o) 

• “predicate_objects” returns a subgraph
• Applications may want more
  • i.e., return complex subgraph with parts missing
• Very important for large and distributed RDF depositories
• There are more than 20 RDF Query languages