As explained in this answer to a similar question:
You would have to define the models separately.
However, you have options for the cases of exclusion and difference.
If you're looking to exclude, which is the easy case, create a model
of with the excluded property, say ModelA. Then define ModelB as
ModelA plus the additional property:
ModelB:
allOf:
- $ref: "#/definitions/ModelA"
- type: object
properties:
id:
type: string
If you're looking to define the difference, follow the same method
above, and exclude the id from ModelA. Then define ModelB and ModelC
as extending ModelA and add the id property to them, each with its own
restrictions. Mind you, JSON Schema can allow you to follow the
original example above for some cases to "override" a definition.
However, since it is not really overriding, and one needs to
understand the concepts of JSON Schema better to not make simple
mistakes, I'd recommend going this path for now.
