Rebeca Schroeder,  Ronaldo Mello. 

This paper presents an overview of conceptual and logical modeling approaches for XML data. We analyze conceptual and logical models proposed by related work, and also transformation algorithms among the models. At the end of the paper, we suggest some guidelines for a methodology for XML database design that considers the contributions of these work.

http://ccet.ucs.br/erbd2007/artigos/26063.pdf

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