Information Technology Reference
In-Depth Information
Figure 4.10
(a) Store/forward mediator. (b) Transformation mediator. (c) Split/ merge
mediator.
Given the different types of mediation, in Lemma 4.3 we prove
that the value of trans_flag does not influence the existence of
mediators. Hence it is ignored in the mediator existence checking
algorithm.
Lemma 4.3.
The value of trans_flag does not influence the existence of
mediator.
Proof: For a data mapping rule
, the mediator
generated is shown in Figure 4.11. The mediator with transformation
can be reduced to the mediator without transformation, preserving
<
src, target, trans_flag
>
