Liddle, Stephen W.Hewett, Kimball A.Embley, David W.Godlevsky, MikhailLiddle, Stephen W.Mayr, Heinrich C.2019-11-142019-11-1420033-88579-359-8https://dl.gi.de/handle/20.500.12116/29870Data extraction is a necessary technology to deal with the huge and growing collection of unstructured and semistructured information available on the World Wide Web. Ontology-based data extraction is a robust approach, but the construction of ontologies is a technical task requiring the services of a human expert. We present a Java-based tool for the graphical creation and testing of data extraction ontologies. This tool leverages standards such as Java and XML to provide a portable, extensible, maintainable, feature-rich environment. This tool reduces the burden on expert ontology developers and simplifies the task of ontology creation.enText/Conference Paper1617-5468