tosca.datatypes.Root:
  description: The TOSCA root Data Type all other TOSCA base Data Types derive from

string:
  derived_from: tosca.datatypes.Root
  
integer:
  derived_from: tosca.datatypes.Root 

tosca.datatypes.Credential2: 
  derived_from: tosca.datatypes.Root
  properties: 
    protocol2: 
      type: string
      required: false

tosca.datatypes.Credential: 
  derived_from: tosca.datatypes.Root
  properties: 
    protocol: 
      type: integer
      required: false