XQL and proximal nodes

@article{BaezaYates2002XQLAP,
  title={XQL and proximal nodes},
  author={Ricardo A. Baeza-Yates and Gonzalo Navarro},
  journal={JASIST},
  year={2002},
  volume={53},
  pages={504-514}
}
We consider the recently proposed XQL language, which is designed to query XML documents by content and structure. We show that an already existing model, namely \Proximal Nodes", is the only one that addresses all the complex querying operations deened by XQL and that suggests an eecient implementation for them. 
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