August 2005
Intermediate to advanced
350 pages
10h 29m
English
Content preview from Essential Business Process Modeling
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Family Tree
Pi-calculus and the Petri net (or some combination of the two) provide the theoretical underpinnings for most of the major BPM standards. Four of the major contemporary standards betray pi-calculus influence:
WS-CDL
WSCI
BPML
XLANG
Three other major standards derive from the Petri net:
BPMN
YAWL
WSFL
Finally, BPEL is a blend, inheriting traits of pi and Petri from its parent languages XLANG and WSFL, respectively. Figure 3-1 illustrates these relationships.
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Figure 3-1. Theory family tree for BPM standards
In Figure 3-1, boxes represent standards, circles theories, and arrows dependencies. The level of dependency is extremely variable. Petri, for example, is woven into the fabric of YAWL, whereas BPMN and WSFL seem to merely draw inspiration from it. Pi’s connection to each of its children is inspiration at best and mere hype at worst.
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