Retrieving XML data from heterogeneous sources through vague querying

@article{Fazzinga2009RetrievingXD,
  title={Retrieving XML data from heterogeneous sources through vague querying},
  author={Bettina Fazzinga and Sergio Flesca and Andrea Pugliese},
  journal={ACM Trans. Internet Techn.},
  year={2009},
  volume={9},
  pages={7:1-7:35}
}
We propose a framework for querying heterogeneous XML data sources. The framework ensures high autonomy to participating sources as it does not rely on a global schema or on semantic mappings between schemas. The basic intuition is that of extending traditional approaches for approximate query evaluation, by providing techniques for combining partial answers coming from different sources, possibly on the basis of limited knowledge about the local schemas (i.e., key constraints). We define a… CONTINUE READING
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