Reliable SPARQL Queries With Consistent Results Over P2P-Shared RDF Storage

One aim of the semantic web is to build large knowledge bases distributed over the internet. Knowledge management systems that gather, merge and make available the information physically stored in multiple locations suffer from consistency and data fragmentation issues due to node failures. In this paper the authors address such problems and they present an architecture for managing reliable SPARQL queries with consistent results over a P2P-shared RDF storage. The RDF-storage is composed of peer nodes organized in a ring topology based on a Distributed Hash Table (DHT) where each node provides an entry point that enables clients outside the network to query the knowledge base using atomic, disjunctive, and conjunctive SPARQL queries.