The REST API supports XML and JSON as representations. Representations are supported by the implementation of serializer classes that are registered in system properties.
The XML and JSON representations are registered in the following REST API system properties:
You can extend serializers for custom processing. You can create serializers for existing resource types, and for individual instances of business object resources or object structure resources.
For object structure resources, the XML format for the REST API is similar to the format that is supported by the integration framework.