XML has become a widely used standard for data exchange among applications. Consequently, a large amount of data is distributed on the Web and stored in different persistence models. DBMSs provide concurrency control techniques to manage such data. However, the structure of XML data makes the application of these techniques difficult. Regarding distributed environments, there are few papers available and they all have limitations. This paper introduces DTX, a mechanism for distributed concurrency control for XML data. In order to evaluate DTX, experiments that measure its performance are presented.
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