Bioinformatics Advance Access originally published online on July 1, 2004
Bioinformatics 2004 20(17):3206-3213; doi:10.1093/bioinformatics/bth386
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Bioinformatics vol. 20 issue 17 © Oxford University Press 2004; all rights reserved.
BioRAT: extracting biological information from full-length papers
Bioinformatics Unit, Department of Computer Science, University College London, Gower Street, London, WC1E 6BT, UK
Received on December 19, 2003; revised on June 4, 2004; accepted on June 25, 2004
Advance Access Publication July 1, 2004
Motivation: Converting the vast quantity of free-format text found in journals into a concise, structured format makes the researcher's quest for information easier. Recently, several information extraction systems have been developed that attempt to simplify the retrieval and analysis of biological and medical data. Most of this work has used the abstract alone, owing to the convenience of access and the quality of data. Abstracts are generally available through central collections with easy direct access (e.g. PubMed). The full-text papers contain more information, but are distributed across many locations (e.g. publishers' web sites, journal web sites and local repositories), making access more difficult.
In this paper, we present BioRAT, a new information extraction (IE) tool, specifically designed to perform biomedical IE, and which is able to locate and analyse both abstracts and full-length papers. BioRAT is a Biological Research Assistant for Text mining, and incorporates a document search ability with domain-specific IE.
Results: We show first, that BioRAT performs as well as existing systems, when applied to abstracts; and second, that significantly more information is available to BioRAT through the full-length papers than via the abstracts alone. Typically, less than half of the available information is extracted from the abstract, with the majority coming from the body of each paper. Overall, BioRAT recalled 20.31% of the target facts from the abstracts with 55.07% precision, and achieved 43.6% recall with 51.25% precision on full-length papers.
Availability: The software and documentation can be found at http://bioinf.cs.ucl.ac.uk/biorat
Contact: d.corney{at}cs.ucl.ac.uk; dtj{at}cs.ucl.ac.uk
* To whom correspondence should be addressed.
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