The ICS-FORTH Semantic Web Integration Middleware (SWIM).
Vassilis Christophides, Gregory Karvounarakis, Aimilia Magkanaraki, Dimitris Plexousakis, Val Tannen · 2003
This paper presents the fundamental ideas for devising a comprehensive framework that allows user communities to 1. specify XML RDF and RDB RDF mappings; 2. verify that these mappings conform to the semantics of the employed SW ontologies; 3. compose RQL queries with these mappings and produce XML or RDB queries; 4. specify further levels of abstraction as RDF RDF views; 5. compose RQL queries with such views; 6. perform query optimizations