Development Method And Practice Research On Domain Ontology

Since 1990s,ontology has been introduced in Artificial Intelligence, Knowledge Engineering and Library & Information sciences.Ontology learning includes the research on knowledge representation and knowledge organization in the domains mentioned above.In Library & Information science,ontology is a vocabulary with the specification of relationships between terms about a special domain.The latest fruits of ontological theory and method have been described systematically on the basis of intensive investigation of large number of documents and web pages on ontology learning in this report since 2004.The fact,trends,applications,main technologies,institutes which majoring in this field have all been discussed in this report.Standardization of ontological technology,semantic annotation based-on ontology,and top ontology transformation in OWL DL,have been studied,tested and analyzed deeply. Ten hot issues in ontology construction have been discovered."Ontology on ontology" had been provided.Based on floricultural literature tentative ontology-based prototype, agricultural thesauri based knowledge base,and opencyc open source project based top ontology,LODE(Large ontology Development Environment) has been developed.Oracle DB technology and.NET have been used in developing the functions of knowledge entrance and semantic annotation.The general approach of domain ontology construction had been studied and summarized.There are some conclusions as following:(1) Ontology construction and ontology application is a pair of contradictory unity based on the discovery of 10 hot issues in ontological theory and practice.(2) Cyc ontology is a more logical top ontology than SUMO based on the transformation and comparison between these two top ontologies from OWL Full to OWL DL. (3) LODE aims at collaborative development.The functions of knowledge entrance and semantic annotation have been developed.The searching function is under developing.Though manual work is still in need,the research in this field has really been promoted.The important significance of this report is the introducing of key issues in ontology theory and realizing an ontology-based demo system in library and information fields in China.LODE can be used as a paradigm in the fields for future relevant research.