A framework for effective retrieval
ACM Transactions on Database Systems (TODS)
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Modern computerized information retrieval systems consist of mechanisms to acquire, describe (e.g., index), and store "documents", and to receive, analyze, and respond to queries for information for users. A key element is the index language, by which the users (or user intermediaries) and indexers can communicate. Modern technology allows natural language processing mechanisms to begin to be incorporated in the sense of matching terms found in the free text specification of the query and the free text within the document.