Information Technology Reference
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tool to better combine business data and service data and further
combine business requirements and service operations. In the remaining
sections of this chapter, we concentrate on the approach and algorithm
for data-driven service composition while leaving the issue of virtual
data for future exploration.
3.3 DATA-DRIVEN SERVICE COMPOSITION
Based on the data relations and composition rules, we are now ready to
solve the problem formulated in Section 3.1.2. That is, if a business
requirement is represented as
I
O
, find a service composition from a
service portfolio to realize this requirement.
!
3.3.1 Basic Definitions
Here, some definitions to be used later are given.
Definition3.2. (AcyclicWell-Structured Process, AWSP)
An
Acyclic
Well-Structured Process
is defined as follows:
1. A transition with one single input place and one single output
place is an AWSP.
2. All Petri nets obtained by using transformation rules 1-3 in
Figure 3.7 are AWSPs.
Rule 1
Rule 2
Rule 3
Figure 3.7
Generation rules for AWSP.
