Annotation-based document retrieval with probabilistic logics

Authors:
Ingo Frommholz
Affiliations:
University of Duisburg-Essen, Duisburg, Germany
Venue:
ECDL'07 Proceedings of the 11th European conference on Research and Advanced Technology for Digital Libraries
Year:
2007

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Abstract

Annotations are an important part in today's digital libraries and Web information systems as an instrument for interactive knowledge creation. Annotation-based document retrieval aims at exploiting annotations as a rich source of evidence for document search. The POLAR framework supports annotation-based document search by translating POLAR programs into four-valued probabilistic datalog and applying a retrieval strategy called knowledge augmentation, where the content of a document is augmented with the content of its attached annotations. In order to evaluate this approach and POLAR's performance in document search, we set up a test collection based on a snapshot of ZDNet News, containing IT-related articles and attached discussion threads. Our evaluation shows that knowledge augmentation has the potential to increase retrieval effectiveness when applied in a moderate way.