Introduction to Modern Information Retrieval
Introduction to Modern Information Retrieval
A decision theory approach to optimal automatic indexing
SIGIR '82 Proceedings of the 5th annual ACM conference on Research and development in information retrieval
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The automatic indexing system AIR/PHYS and its evaluation by means of a retrieval test with 309 requests and 15,000 documents is described. First, the underlying conception of a rule based approach is given which is suited to the task of a controlled-vocabulary indexing of even large subject fields. Preconditions, performance and results of the retrieval test are described, including first results of retrieval runs with weighted automatic indexing.