From structured documents to novel query facilities

  • Authors:

  • V. Christophides;S. Abiteboul;S. Cluet;M. Scholl

  • Affiliations:

  • I.N.R.I.A., 78153 Le Chesnay, Cedex, France;I.N.R.I.A., 78153 Le Chesnay, Cedex, France;I.N.R.I.A., 78153 Le Chesnay, Cedex, France;I.N.R.I.A., 78153 Le Chesnay, Cedex, France and Cedric/CNAM, 292 rue St Martin 75141, Paris Cedex 03, France

  • Venue:
  • SIGMOD '94 Proceedings of the 1994 ACM SIGMOD international conference on Management of data
  • Year:
  • 1994

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Abstract

Structured documents (e.g., SGML) can benefit a lot from database support and more specifically from object-oriented database (OODB) management systems. This paper describes a natural mapping from SGML documents into OODB's and a formal extension of two OODB query languages (one SQL-like and the other calculus) in order to deal with SGML document retrieval.Although motivated by structured documents, the extensions of query languages that we present are general and useful for a variety of other OODB applications. A key element is the introduction of paths as first class citizens. The new features allow to query data (and to some extent schema) without exact knowledge of the schema in a simple and homogeneous fashion.