Abstract: The search results from the present Web search engine arc all the Web files, Web pages or the links annotated based on keywords,and it does not support the inner information searcheding of these files. In order to support the inner searching of a file, it researched on the multi-granularity semantic annotation of Web resource, which named the root node, the branch node, the leaf node and the resource information metadata, to manage the Web resource. Based on it, it also researched the searching technology based on ontology, and by the primary experiment and analyses, it shows that it can enhance the efficiency of searching and getting information data from the multiform and great deal of Web resources.

Key words: Semantic annotation, Wcb resource, Resource information metadata, Ontology, Multi granularity