The database language GEM

  • Authors:
  • Carlo Zaniolo

  • Affiliations:
  • Bell Laboratories Holmdel, New Jersey

  • Venue:
  • SIGMOD '83 Proceedings of the 1983 ACM SIGMOD international conference on Management of data
  • Year:
  • 1983

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Abstract

GEM (an acronym for General Entity Manipulator) is a general-purpose query and update language for the DSIS data model, which is a semantic data model of the Entity-Relationship type. GEM is designed as an easy-to-use extension of the relational language QUEL, providing support for the notions of entities with surrogates, aggregation, generalization, null values, and set-valued attributes.