The language of plain SO-tgds: Composition, inversion and structural properties

@article{Arenas2013TheLO,
  title={The language of plain SO-tgds: Composition, inversion and structural properties},
  author={Marcelo Arenas and Jorge P{\'e}rez and Juan L. Reutter and Cristian Riveros},
  journal={J. Comput. Syst. Sci.},
  year={2013},
  volume={79},
  pages={763-784}
}
The problems of composing and inverting schema mappings specified by source-to-target tuple-generating dependencies (st-tgds) have attracted a lot of attention, as they are of fundamental importance for the development of Bernstein’s metadata management framework. In the case of the composition operator, a natural semantics has been proposed and the language of second-order tuple generating dependencies (SO-tgds) has been identified as the right language to express it. In the case of the… CONTINUE READING
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