Yes you can. By default MVC tries to minimise the mapping required by automatically binding and orchestrating the screen information with the remote web services. However, you have full control on the server-side between the screens and the remote services. XML can be intercepted in either direction and processed in the desired manner.
An example of this may be to design a screen from an XSD that contains patient information and their medical history records. However, at runtime the patient information may originate from one web service and the medical history may originate from a separate web service. This information can be combined and presented on the same screen. Equally, once the information is modified (if modifiable), then the information can be separated before submission to their respective web services.
The range of operations on the server is quite extensive, including basic XSL transformations, schema validations, copying, making remote service calls, etc. This is performed by a native XML rules engine. You can learn more about the range of available options within the product documentation.
An example of this may be to design a screen from an XSD that contains patient information and their medical history records. However, at runtime the patient information may originate from one web service and the medical history may originate from a separate web service. This information can be combined and presented on the same screen. Equally, once the information is modified (if modifiable), then the information can be separated before submission to their respective web services.
The range of operations on the server is quite extensive, including basic XSL transformations, schema validations, copying, making remote service calls, etc. This is performed by a native XML rules engine. You can learn more about the range of available options within the product documentation.