Title

Evaluating keyword selection methods for WEBSOM text archives

College

College of Computer Studies

Department/Unit

Computer Technology

Document Type

Article

Source Title

IEEE Transactions on Knowledge and Data Engineering

Volume

16

Issue

3

First Page

380

Last Page

383

Publication Date

3-1-2004

Abstract

The WEBSOM methodology, proven effective for building very large text archives, includes a method that extracts labels for each document cluster assigned to nodes in the map. However, the WEBSOM method needs to retrieve all the words of all the documents associated to each node. Since maps may have more than 100,000 nodes and since the archive may contain up to seven million documents, the WEBSOM methodology needs a faster alternative method for keyword selection. Presented here is such an alternative method that is abie to quickly deduce meaningful labels per node in the map. It does this just by analyzing the relative weight distribution of the SOM weight vectors and by taking advantage of some characteristics of the random projection method used in dimensionality reduction. The effectiveness of this technique is demonstrated on news document collections.

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Digitial Object Identifier (DOI)

10.1109/TKDE.2003.1262193

Disciplines

Computer Sciences

Keywords

Text processing (Computer science); Automatic indexing

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