cats-schema.json

{
  "types": [
    {
      "name": "cat",
      "attributes": {
        "name": {
          "generator": ["one-of", ["Cleo", "Lucy", "Oliver", "Tiger"]],
          "constraints": ["unique"]
        },
        "favorite": {
          "generator": ["one-of", ["fish", "mice", "birds"]]
        },
        "fed-by": {
          "deps": [[["fed-by/cat", "cat/name"], "fed-by/person", "person/name"]]
        }
      }
    }, {
      "name": "person",
      "refs": {
        "cat": {
          "deps": ["cat/name"]
        }
      },
      "attributes": {
        "name": {
          "generator": ["one-of", ["Fred", "Wilma", "Barney", "Betty"]],
          "constraints": ["unique"]
        },
        "dilemma": {
          "deps": ["person/name", ["person/cat", "cat/name"], ["person/cat", "cat/favorite"]],
          "generator": ["format", "%s loves %s but %2$s loves %s"]
        }
      }
    }, {
      "name": "fed-by",
      "refs": {
        "pair": {
          "unique": [true, false],
          "deps": ["cat/name", "person/name"],
          "attributes": ["cat", "person"]
        }
      },
      "attributes": {
        "arrangement": {
          "deps": [["fed-by/person", "person/name"], ["fed-by/cat", "cat/name"]],
          "generator": ["format", "%s feeds %s"]
        }
      }
    }
  ]
}