In the early days of BPM – four or five years ago – everyone thought BPEL was the BPM standard, at least for runtime execution. Not long after, the importance of business-friendly process modeling came to the fore, and BPMN emerged as the standard for that. The mismatch between graph-oriented BPMN models, where you can route the flow just about anywhere, and block-oriented BPEL, where you can’t, didn’t seem to worry BPM vendors. After all, a model was just a model, a business requirements document in diagrammatic form.
