![]() Due to the fact that XML naturally represents hierarchical and reference structure of business process models, these models can be compared using their XML representations. Every process modeling standard has its advantages and disadvantages, but almost all of them comprise an XML schema, which defines process serialization rules. EPC, YAWL, BPEL, XPDL and BPMN are only a small fraction of available notations that have found acceptance among developers. Also there is no universally accepted standard for modeling them. The complexity of the problem is explained by the fact there is a lack of tools that can be used for comparing business process models.
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