Abstract
One of the prominent characteristics of XML applications is their dynamic nature. Changes in user requirements cause changes in schemas used in the systems and changes in the schemas subsequently make existing documents invalid. In this work, we study two tightly coupled problems—schema evolution and document adaptation. The presented approach extends an existing conceptual model for evolution of XML applications towards document adaptation, by introducing a formal framework for detecting changes between two versions of a schema. From the detected changes it is possible to create a script that transforms documents valid against the old version of the schema to documents valid against its new version.
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Notes
More on this system can be found in Section 5
Note that since \({\cal S}'\) is a forest, we could model R′ directly as a pair of connected components. However, we use association ends to unify the formalism of PSM with the formalism of PIM.
Another possibility is to utilize function default proposed in earlier in this section.
And other attributes of class EnvelopeType.
Not to be confused with XQuery Update Facility (W3C 0011)
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This work was supported in part by the Czech Science Foundation (GAČR), grants number P202/10/0573 and P202/11/P455.
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Malý, J., Nečaský, M. & Mlýnková, I. Efficient adaptation of XML data using a conceptual model. Inf Syst Front 16, 663–696 (2014). https://doi.org/10.1007/s10796-012-9375-8
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DOI: https://doi.org/10.1007/s10796-012-9375-8