Bridge ontology and its role in semantic annotation

Multiontologies environment is common such as the semantic annotation applications based on multiontologies. Based on analyzing and classifying the relationships between multiontologies, we propose the idea of bridge ontology, and present its detailed structure too. To deal with the semantic annotation problem based on multiontologies, a new approach is proposed which employing bridge ontology to express the complex relationships between multiontologies. The bridge ontology is a peculiar ontology, which can be created and maintained conveniently, and is effective in the applications based on multiontologies. The approach using bridge ontology has the advantages of low-cost, scalable, robust in the Web circumstance, avoiding the unnecessary ontology extending and integration, and promoting ontology reuse.