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The contemporary Web is heading towards its next stage of evolution. From a clump of unorganized information spaces, the Web is becoming more focused on the meaning of information that is a Semantic Web. Trust is an integral component in semantic web, allowing people to act under uncertainty and with the risk of negative consequences. In this paper we discussed trust management and its connection to the semantic web. We first discussed aspects of semantic web and trust management including defining trust and describing trust negotiations and then relationship of them. After that we explored how mechanisms of XML access control are used to protect the confidentiality, integrity and availability of ontologies in trust management.