Question 10

Question

You are told that in this service composition architecture, all four services are exchanging invoice
related data in an XML format. The services in Service Inventory A are standardized to use a specific
XML schema for invoice data. Design standards were not applied to the service contracts used in
Service Inventory B, which means that each service uses a different XML schema for the same kind of
data. Database A and Database B can only accept data in the Comma Separated Value (CSV) format
and therefore cannot accept XML formatted data. What steps can be taken to enable the planned
data exchange between these four services?
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Accepted Answer

The Data Model Transformation pattern can be applied so that data model transformation logic is
positioned between Service A and Service B, between Service A and Service C, and between Service
C and Service D . The Data Format Transformation pattern can be applied so that data format
transformation logic is positioned between the Service B logic and Database A and between the
Service D logic and Database B .

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