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The Canonical Data Model EIP minimizes dependencies when integrating applications that use different data formats. It is independent from any specific application , and requires each application to produce and consume messages in this common format. For more information, refer to http://www.eaipatterns.com/CanonicalDataModel.html.
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The Canonical Data Model EIP minimizes dependencies between applications that use different data formats in messaging systems. That This model ensures loose-coupling between applications.
WSO2 ESB supports a number of different data formats including Plain Old XML (POX), JSON, and SOAP. Translating to a common data model (SOAP in WSO2 ESB) and back to the original format is done using the underlying implementations of message builders and message formatters. If the receiving messages are not in the format the back-end service requires, users can use a Translator the XSLT mediator or create a new message in SOAP format . The Payload Factory mediator can be used for thatusing the PayloadFactory mediator.
Also see Normalizer EIPNormalizer for sample scenarios and explanations.