Peer-to-Peer Semantic Integration of XML and RDF Data Sources

Abstract

Abstract. Peer-to-Peer (P2P) data management systems combine traditional schema-based integration techniques with the P2P infrastructure. In this paper, we propose a P2P data management framework named PEPSINT that semantically integrates heterogeneous XML and RDF data sources, using a hybrid architecture and a global-as-view approach. Our focus is on the query processing techniques over heterogeneous data. Queries in PEPSINT are expressed in XQuery and in RDQL. We consider two types of queries, depending on whether the query is first posed on the super peer or on one of the peers.

Semantic Integration of Collection Description

“…It is relevant to a number of applications including enterprise information integration, medical information management, geographical information systems, and E-Commerce applications. Based on the architecture, there are two different kinds of systems: central data integration systems [1,3,7,10,18,22] and peer-to-peer data integration systems [2,4,5,11,16,19]. A central data integration system usually has a global schema, which provides the user with a uniform interface to access information stored in the data sources.…”

“…More specifically, XML Schema and RDFS use the same syntax and can be used for data modeling and ontology representation. But they have their own particular features in the sense that XML data has document structure in terms of the nesting elements in an individual XML document, whereas RDF data has domain structure formed by the concepts and relationships between concepts [11,16]. We shall discuss this issue in detail in Section 4.…”

“…A hybrid peer-to-peer system, where a global ontology exists in a "super-peer" can also use the hybrid ontology approach [11]. The multiple ontology approach can be best used to construct pure peer-to-peer data integration systems, where there are no super-peers.…”

“…The three first case studies are in the context of centralized data integration systems (Section 4), while the last two are in the context of peer-to-peer data integration systems (Section 5). We base our discussion on our previous work [9,10,11,24,25].…”

A layered framework supporting personal information integration and application design for the semantic desktop

“…As mentioned before, two PIAs can communicate in a P2P fashion based on the application ontology mappings established between them. There have been plenty of previous work on central and P2P ontology and data integration [21,22,60,63]. However, it is required in this case that the two PIAs are designed for a similar task, for which they have their application ontologies overlapping partially or fully.…”