YAML

!_Schema
types: !_Map_Type
  !_Identifier EnumValueAlias: !_TypeEnum
    allItems:
      - !_EnumLabel
        aliases: [val1,val2]
        enum: EnumValueAlias
        name: enumValueAlias
    items:
      - !_Aliased
        aliases: [val1,val2]
        name: enumValueAlias
    name: EnumValueAlias
    typeKind: !_TypeKind Enum

Types

_Enum EnumValueAlias

Value	Aliases	Enum
enumValueAlias	val1, val2	EnumValueAlias