Automatic phrase indexing for document retrieval
SIGIR '87 Proceedings of the 10th annual international ACM SIGIR conference on Research and development in information retrieval
The maximum entropy principle in information retrieval
Proceedings of the 9th annual international ACM SIGIR conference on Research and development in information retrieval
Some research problems in automatic information retrieval
SIGIR '83 Proceedings of the 6th annual international ACM SIGIR conference on Research and development in information retrieval
A Markov random field model for term dependencies
Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval
Viewing term proximity from a different perspective
ECIR'08 Proceedings of the IR research, 30th European conference on Advances in information retrieval
Modeling higher-order term dependencies in information retrieval using query hypergraphs
SIGIR '12 Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval
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The tree dependence model has been used successfully to incorporate dependencies between certain term pairs on the information retrieval process, while the Bahadur Lazarsfeld Expansion (BLE) which specifies dependencies between all subsets of terms has been used to identify productive clusters of items in a clustered data base environment. The successes of these models are unlikely to be accidental; it is of interest therefore to examine the similarities between the two models. The disadvantage of the BLE model is the exponential number of terms appearings in the full expression, while a truncated BLE system may produce negative probability values. The disadvantage of the tree dependence model is the restriction to dependencies between certain term pairs only and the exclusion of higher-order dependencies. A generalized term dependence model is introduced in this study which does not carry the disadvantages of either the tree dependence or the BLE models. Sample evaluation results are included to demonstrate the usefulness of the generalized system.