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Conceptual queries using ConQuer-II

  • Session 4a: Languanges
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Conceptual Modeling — ER '97 (ER 1997)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 1331))

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Abstract

Formulating non-trivial queries in relational languages such as SQL and QBE can prove daunting to end users. ConQuer is a conceptual query language that allows users to formulate queries naturally in terms of elementary relationships, operators such as “and”, “or”, “not” and “maybe”, contextual for clauses and object-correlation, thus avoiding the need to deal explicitly with implementation details such as relational tables, null values, outer joins, group by clauses and correlated subqueries. While most conceptual query languages are based on the Entity-Relationship approach, ConQuer is based on Object-Role Modeling (ORM), which exposes semantic domains as conceptual object types, allowing queries to be formulated via paths through the information space. As a result of experience with the first implementation of ConQuer, the language has been substantially revised and extended to become ConQuer-II, and a new tool, ActiveQuery, has been developed with an improved interface. ConQuer-II's new features such as arbitrary correlation and subtyping enable it to be used for a wide range of advanced conceptual queries.

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Author information

Authors and Affiliations

  1. InfoModelers Inc., 110 1 10th Ave NE, 98004, Bellevue, WA, USA

    A. C. Bloesch

  2. School of Information Technology, The University of Queensland, 4072, Australia

    T. A. Halpin

Authors
  1. A. C. Bloesch
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  2. T. A. Halpin
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Editor information

David W. Embley Robert C. Goldstein

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© 1997 Springer-Verlag Berlin Heidelberg

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Bloesch, A.C., Halpin, T.A. (1997). Conceptual queries using ConQuer-II. In: Embley, D.W., Goldstein, R.C. (eds) Conceptual Modeling — ER '97. ER 1997. Lecture Notes in Computer Science, vol 1331. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-63699-4_10

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  • DOI: https://doi.org/10.1007/3-540-63699-4_10

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-63699-1

  • Online ISBN: 978-3-540-69630-8

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