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 

map:
  derived_from: tosca.datatypes.Root 

tosca.datatypes.Credential: 
  derived_from: tosca.datatypes.Root
  properties: 
    keys:
      type: map
      required: false
      entry_schema:
        type: string