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About evaluation part. The author only ga … About evaluation part. The author only gave the response time when increasing the number of FROM and WHERE clauses. Is this response time acceptable? What portion does it take in the overall query response time? Since the RDF queries are expanded, will this bring extra overheard to the query processing and execution? Moreover, the author should compare with response time resulting from other access control mechanisms, as stated in section 3. ontrol mechanisms, as stated in section 3.
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