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We describe a toolkit for highly scalable XML data processing, consisting of two components. The first is a collection of stand-alone XML tools, sa sort-ing, aggregation, nesting, and unnesting, that can be chained to express more complex restructurings. The second is a highly scalable XPath processor for XML streams that can be used to develop scalable solutions for XML stream applications. In this paper we dis-cuss the tools, and some of the techniques we used to achieve high scalability. The toolkit is freely available as an open-source project.