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Security and privacy are key concerns for the current dimension the Internet has reached in our daily life. Policies representing resource access based on knowledge-oriented descriptions have gained momentum with the emergence of Semantic Technologies based approaches. Traditional access control frameworks were syntactic and error prone, lacking the necessary expressivity and efficiency of a solution where soundness and completeness of the underlying logics in access control descriptions coulddoi:10.1016/j.csi.2009.10.003 fatcat:nfbip6tglbhqdmrt4liyccoecy