Abstract: This paper proposed an ontology based TC;M semantic graph discovery of TCM Document, The core method includes three procedures. Firstly, extract keywords from the TCM documents, using the TCM ontology concept name as dictionary. Secondly calculate the frequency of the keywords. hhirdly, identify the semantic relation between the keywords with the TC;M ontology knowledge base. Furthermore, predict the semantic relation that can' t be identified.Therefore, every group of keywords could generate a semantic graph that express the possible semantic of the original sentence. In the experiment section, the TCM ontology knowledge base was used to identify the semantic graph from TCM Documents,and verify the feasibility of the method of this paper.

Key words: TCM ontology, Semantic graph