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This paper presents Xspace, a programmable coordination paradigm for In-ternet applications based on mobile agents. The Xspace system fully exploits the advantages ofthe XML language and Linda-like coordination. It supports XML documents as tuple fields andmultiple matching routines implementing different relations among XML documents, includingthose given by XML query languages. The Xspace uses Java as the implementation language; itis based on object-oriented XMLized tuple spaces to implement a portable and programmablecoordination paradigm for mobile agents. The design and implementation procedures of Xspaceare described in this paper. Experiment and performance evaluation are also made. Finally,some conclusions and remarks are given.