A Data Definition and Mapping Language.

@article{DBLP:journals/cacm/SibleyT73,
  author    = {Edgar H. Sibley and
               Robert W. Taylor},
  title     = {A Data Definition and Mapping Language},
  journal   = {Commun. ACM},
  volume    = {16},
  number    = {12},
  year      = {1973},
  pages     = {750-759},
  ee        = {db/journals/cacm/SibleyT73.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

Copyright © 1973 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.

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