The Reserarch Of Trust Algorithm Base On Ontology In Semantic Web

With the rapid development of network and information times, Users selection and utilizationinformation resources has become an increasingly serious problem in people's information life ,then the credibility calculation of information resources is able to solve this problem provide very good help. Now the semantic trust computation has gained a lot of progress, but it also has some shortcomings that is its congenital defects of technology caused it. The defect Ignore the semantics of node. Each node contain specific semantic.The different node which structure, define, levels in the document may be different, but its semantic may be similar.To solve these problems, this paper analyzes the semantic problem of XML, and presenting a new mechanism change xml document toowl document which based on XML technology. Basing on the methodology we propose a modified semantic trust calculation method of ontology. With the XML's structural , this formula full consider five main factors(Concept, density, semantic weight, depth, The hierarchical structure of semantic weight) that effecting semantic trust between nodes, and through example setting i this influence factors of parameters, so it can apply to most document of the network. In order to validate the formula's effect better than the traditional formula's of semantics distance, we application example simulation on it . Experimental results show that, The method in text semantic trust in [0.4, 0.8], The improved calculation method are better able to distinguish the trust between nodes of documents. Give document better clustering.