Union type is not working when not at schema root

[rperne]

oneOf, for example, is working when we have it at schema root :

"content": {
              "application/json": {
                "schema": {
                  "oneOf": [
                 

but not when in embedded in a sub schema :

"Animal": {
  "type": "object",
  "oneOf": [
    {
      "$ref": "#/components/schemas/Cat"
    },
    {
      "$ref": "#/components/schemas/Dog"
    }
  ],
  "discriminator": {
    "propertyName": "type",
    "mapping": {
      "cat": "#/components/schemas/Cat",
      "dog": "#/components/schemas/Dog"
    }
  }
},

[rperne]

I don't really understand if my case is matching the specs... maybe not, after all. The samples here are all at "root" levels :

https://swagger.io/docs/specification/v3_0/data-models/oneof-anyof-allof-not/

[tomasweigenast]

Same here