Abstract

WWW home page:http://www.exeura.it Abstract. The paper describesHıLεX, a new ASP-based system for the extraction of information from unstructured documents. Unlike previous systems, which are mainly syntactic,HıLεX combines both semantic and syntactic knowledge for a powerful information extraction. In particular, the exploitation of background knowledge, stored in a domain ontology, allows to empower significantly the information extraction mechanisms. HıLεX is founded on a new two-dimensional representation of documents, and heavily exploits DLP + – an extension of disjunctive logic programming for ontology representation and reasoning which has been recently implemented on top of DLV. The domain ontology is represented in DLP +, and the extraction patterns are encoded by DLP + reasoning modules, whose execution yields the actual extraction of information from the input document. HıLεX allows to extract information from both HTML and flat text documents. 1

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