AKSW Blog

Semantic Analysis of Websites

On Monday, May 5, at 13.30 in room P702, Vladimir Salin and Maria Slastihina from Saratov State Technical University, Russia present their research on the website analysis and conversion of website contents as well as metadata to machine-readable form. The processed elements of a websites include hyperlinks, metadata, media assets, text and statistics. The ultimate goal is to convert all the information about a website to be represented as ontologies and facts, which later can be used, for instance, by search engines, internal website searches, relevant pages suggestion engines, SPARQL endpoints.

About the AKSW Colloquium

This event is part of a series of events about Semantic Web technology. Please see http://wiki.aksw.org/Colloquium for further information about previous and future events. As always, Bachelor and Master students are able to get points for attendance and there is complimentary coffee and cake after the session.

Lemon – Lexicon Model for Ontologies

On Wednesday, Feb 26th, 2014, at 1.30 – 4:00 p.m. in Room P702 (Paulinum).

Philipp Cimiano is the head of the Semantic Computing Group at Bielefeld University. He is also affiliated with the Cognitive Interaction Technology Excellence Cluster. Before joining the University of Bielefeld, he was an assistant professor at Delft University of Technology (2008-2009) and a postdoctoral researcher at the Institute AIFB of Universität Kalsruhe (TH).

John McCrae is a post-doctoral researcher at the University of Bielefeld in Bielefeld, Germany. He is currently working in Prof. Philipp Cimiano’s group, AG Semantic Computing. His research interests include the following: Ontologies and the lexicon-ontology interface, Collaborative development and publishing of language resources, Linked data and the Semantic Web, Machine translation and multilingualism, Machine learning methods for NLP, Probabilistic inference.

Abstract

There are a large number of ontologies currently available on the Semantic Web. However, in order to exploit them within natural language processing applications, more linguistic information than can be represented in current Semantic Web standards is required. Further, there are a large number of lexical resources available representing a wealth of linguistic information, but this data exists in various formats and is difficult to link to ontologies and other resources. We present a model we call lemon that supports the sharing of terminological and lexicon resources on the Semantic Web as well as their linking to the existing semantic representations provided by ontologies. We demonstrate that lemon can succinctly represent existing lexical resources and in combination with standard NLP tools we can easily generate new lexica for domain ontologies according to the lemon model. We demonstrate that by combining generated and existing lexica we can collaboratively develop rich lexical descriptions of ontology entities. We also show that the adoption of Semantic Web standards can provide added value for lexicon models by supporting a rich axiomatization of linguistic categories that can be used to constrain the usage of the model and to perform consistency checks.

About the AKSW Colloquium

This event is part of a series of events about Semantic Web technology. Please see http://wiki.aksw.org/Colloquium for further information about previous and future events. As always, Bachelor and Master students are able to get points for attendance and there is complimentary coffee and cake after the session.