PU 28/08/2009 Distributed data structures and algorithms for a Semantic Sensor Grid registry R /intranet/servlet/download?ontology=Documentation+Ontology&concept=Deliverable&instanceSet=SemSorGrid4Env&instance=D3.2&attribute=On-line+PDF+Version&value=d3.2-final.pdf Final 18 D3.2 31/08/2009 12 1.0