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    政大機構典藏 > 理學院 > 資訊科學系 > 期刊論文 >  Item 140.119/69372
    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/69372


    Title: On mapping natural language constructs into relational algebra through E-R representation
    Authors: 陳良弼
    Tseng,Frank S.C.;Chen,Arbee L.P.;Yang,Wei-Pang
    Contributors: 資科系
    Keywords: Relational databases;conceptual schema;natural language queries;Entity-Relationship model;semantic role;query transformation;relational algebra;surrogate;logical form
    Date: 1992-10
    Issue Date: 2014-08-28 10:08:26 (UTC+8)
    Abstract: Research on accessing databases in natural language usually employs an intermediate form for the mapping process from natural language to database languages. However, much effort is needed to bridge the gap between the existing intermediate forms and the database languages. In this paper, we present a methodology to map natural language constructs into relational algebra through E-R representation. This methodology employs a logical form to represent the natural language queries. The logical form has the merits that it can be mapped from natural language constructs by referring to the Entity-Relationship conceptual schema and can be efficiently transformed into relational algebra for query execution. The whole process provides a clear and natural framework for processing natural language queries to retrieve data from database systems.
    Relation: Data & Knowledge Engineering,9(1),97-118
    Data Type: article
    Appears in Collections:[資訊科學系] 期刊論文

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