Building a Vietnamese Lexicon Ontology for Syntactic Parsing and Document Annotation

Vietnamese is an isolating language in which words do not have morphology. It means that if a word changes its syntactic function, it still has the same morphemes. Therefore, an syntactic parser based on only the POS tag of the word still has errors of identifying the phrases of a sentence. In order to overcome this problem, an ontology of Vienamese lexicons should be build to provide the exact syntactic and semantic information of every word for parsing. In addition, this ontology is also built to solve the problems of synonyms of Vietnamese document annotation.