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Comparing AsTMa!, OSL, and Xtche: the Topic Maps Constraint Languages
Currently, we can find three approaches to constrain Topic Maps – AsTMa!, OSL, and XTche – that allow us to specify constraints and to validate the instances of a family of topic maps against that set of rules. With these resemblances it is easy to conclude that they are quite similar.
However they differ in some fundamental concepts. These three Topic Maps constraint specification languages were hardly tested and benchmarked with a huge test suite. The most significant results will be discussed in this paper.