Download or read book An Access Definition and Query Language written by Andreas Sonnenbichler and published by KIT Scientific Publishing. This book was released on 2014-06-11 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work we suggest a meta access control model emulating established access control models by configuration and offering enhanced features like the delegation of rights, ego-centered roles, and decentralized administration. The suggested meta access control model is named ''Access Definition and Query Language'' (ADQL). ADQL is represented by a formal, context-free grammar allowing to express the targeted access control model, policies, facts, and access queries as a formal language.