Term Weighting in Information Retrieval Using the Term Precision Model
C. Yu, K.C. Lam, Gerard Salton · Journal of the ACM · 1982
At3STRACT It iS known that the use of weighted, as opposed to binary, content identifiers attached to the records of an information file improves the effectiveness of the retrieval operations Under well-defined conditions the term precision offers the best possible term weighting system A mathematscal model is used in the present study to relate the term precision weights to the frequency of occurrence of the terms in a given document collecuon and to the number of relevant documents a user wishes to retrieve in response to a query This provides for the assignment of user-dependent weights to the content identifiers and relates the term precision weights to other well-known term weighting systems Categories and Subject Descriptors.H 3 1 [