Constructing a Focused Taxonomy from a Document Collection

introducer: Harald Sack, Hasso-Plattner-Institute, University of Potsdam
author: Anna Divoli, Pingar Inc.
published: July 8, 2013,   recorded: May 2013,   views: 104
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Description

We describe a new method for constructing custom taxonomies from document collections. It involves identifying relevant concepts and entities in text; linking them to knowledge sources like Wikipedia, DBpedia, Freebase, and any supplied taxonomies from related domains; disambiguating conflicting concept mappings; and selecting semantic relations that best group them hierarchically. An RDF model supports interoperability of these steps, and also provides a flexible way of including existing NLP tools and further knowledge sources. From 2000 news articles we construct a custom taxonomy with 10,000 concepts and 12,700 relations, similar in structure to manually created counterparts. Evaluation by 15 human judges shows the precision to be 89% and 90% for concepts and relations respectively; recall was 75% with respect to a manually generated taxonomy for the same domain.

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Download slides icon Download slides: eswc2013_divoli_taxonomy_01.pdf (3.0┬áMB)


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