Media type: E-Article Title: Semantic Techniques for the Web: Rule-Based Policy Representations and Reasoning Contributor: Bonatti, Piero Andrea; De Coi, Juri Luca; Olmedilla, Daniel; Sauro, Luigi Published: Springer Berlin Heidelberg, 2009 Published in: Semantic Techniques for the Web (2009), Seite 201-232 Language: Not determined DOI: 10.1007/978-3-642-04581-3_4 ISSN: 0302-9743; 1611-3349 Origination: Footnote: