Ontology-based Information Extraction: An Overview and a Study of different Approaches

Information Extraction is a process to retrieve Information from Natural Language Text or unstructured text by automated process. OBIE[1] (Ontology based Information Extraction) is one of the most emerging subfields of Information Extraction. Where Ontology is a formal and explicit specification of conceptualization which plays a crucial role in the process of Information Extraction[2]. Ontology has potential to support to build a Semantic Web and also plays a vital role in the Knowledge Representation. This paper attempts to survey some relevant research in the field of Ontology Based Information Extraction.