Validation of the redfish schema

[christian-pinto]

The sunfish server should validate that the received payload is in compliance with the RedFish schema

[rherrell]

Implementing a general validation of Redfish schema compliance is a complicated task which we are going to leave until after basic algorithms and new Redfish Schemas are working in the reference code. Ideally, we will be able to import such compliance validation routines from the DTMF.org materials.

We have implemented checking for the mandatory @odata.id and @odata.type properties to reject totally corrupt json files that are not compliant.