Knowledge Extraction by using an Ontology Based Annotation Tool

Vargas-Vera, Dr Maria and Motta, Dr Enrico and Domingue, Dr John and Buckinham Shum, Dr Simon and Lanzoni, Mr Mattia (2001) Knowledge Extraction by using an Ontology Based Annotation Tool . In Handschuh, Mr Siegfried and Dieng, Miss Rose and Staab, Dr Steffen, Eds. Proceedings Workshop on Knowledge Markup & Semantic Annotation, held in association with the First International Conference on Knowledge Capture (K-CAP 2001)., pages pp. 5-12, Victoria, Canada.

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This paper describes a Semantic Annotation Tool for extraction of knowledge structures from web pages through the use of simple user-defined knowledge extraction patterns. The semantic annotation tool contains: an ontology-based mark-up component which allows the user to browse and to mark-up relevant pieces of information; a learning component (Crystal from the University of Massachusetts at Amherst) which learns rules from examples and an information extraction component which extracts the objects and relation between these objects. Our final aim is to provide support for ontology population by using the information extraction component. Our system uses as domain of study “KMi Planet”, a Webbased news server that helps to communicate relevant information between members in our institute.

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