DOCUMENTATION NOTE QUERY‐DOCUMENT SYMMETRY AND DUAL MODELS
- 1 March 1994
- journal article
- Published by Emerald Publishing in Journal of Documentation
- Vol. 50 (3) , 233-238
- https://doi.org/10.1108/eb026932
Abstract
The idea that there is some natural symmetry between queries and documents is explored. If symmetry can be assumed, then it leads to a conception of ‘dual’ models in information retrieval (given a model, we can construct a dual model in which the roles of documents and queries are reversed). But symmetry breaks down in various ways, which may invalidate this construction. If we can construct a dual, it is not obvious that it can be combined with the original.Keywords
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