BPMN 2.0 File Formats - With a Transformation to a Transformation

BPMN 2.0 defines two official file formats for interchange: One XML format defined by the XML schema and one XMI format defined by the CMOF metamodel. Consequently the standard also contains two transformations scripts that can convert files between the two formats. But how are these XSLT scripts created and maintained? How is ensured that they work correctly?

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