Knowledge Engineering and Knowledge Management: Ontologies and the Semantic Web

Abstract

The process of document annotation for the Semantic Web is complex and time consuming, as it requires a great deal of manual annotation.Information extraction from texts (IE) is a technology used by some very recent systems for reducing the burden of annotation.The integration of IE systems in annotation tools is quite a new development and there is still the necessity of thinking the impact of the IE system on the whole annotation process.In this paper we initially discuss a number of requirements for the use of IE as support for annotation.Then we present and discuss a model of interaction that addresses such issues and Melita, an annotation framework that implements a methodology for active annotation for the Semantic Web based on IE.Finally we present an experiment that quantifies the gain in using IE as support to human annotators.