Pre-Coordination + Post-Coordination

The introduction of computerized post-coordination has solvedmany of the problems of pre-coordinated subject access. However, the adoptionof computerized post-coordination results in the loss of some pre-coordinationbenefits. Specifically, the effect of hiding terms within the context of others islost in post-coordination which gives lead status to every document term. Thisresults in spurious matches of terms out of context. Library patrons andInternet searchers are increasingly dissatisfied with subject accessperformance, in part because of unmanageably large retrieval sets. The needto enhance precision and limit the size of retrieval sets motivates this workwhich proposes partial coordination, an approach which incorporates theadvantages of computer search with the ability of pre-coordination to limitspurious partial matches and thereby enhance precision