A saved configuration for a schema form example, http://textalk.github.io/angular-schema-form/examples/bootstrap-example.html

form.json

[
  {
    "type": "help",
    "helpvalue": "Complex keys are only supported with AngularJS version 1.3.x, see <a href=\"https://github.com/Textalk/angular-schema-form/blob/master/docs/knownlimitations.md\">known limitations</a> in the docs."
  },
  "title",
  "preference",
  {
    "key": "shareholders",
    "title": "Shareholders",
    "items": [
      {
          "key": "name",
          "title": "Shareholder name"
      },
      {
          "key": "email",
          "title": "Email address"
      }
    ]
  }
]

model.json

{
  "array-key": [
    {
      "a'rr[\"l": "a",
      "˙∆∂∞˚¬": "a"
    },
    {}
  ],
  "simple": {
    "prøp": "sasd"
  },
  "shareholder": [
    {}
  ],
  "title": "moo",
  "shareholders": [
    {},
    {}
  ],
  "preference": {
    "preferred": true
  },
  "name": "James Skinner",
  "email": "[email protected]"
}

schema.json

{
  "type": "object",
  "title": "Complex Key Support",
  "properties": {
    "title": {
      "type": "string"
    },
    "preference": {
      "type": "object",
      "properties": {
        "preferred": {
            "type":"boolean"
        },
        "multiplier": {
            "type": "number"
        },
        "required": [
            "preferred"
        ]
      }
    },
    "shareholders": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
            "name": {
                "title": "Shareholder name",
                "type": "string"
            },
            "email": {
                "title": "Email address",
                "type": "string"
            },
            "required": [
              "name",
              "email"
            ]
        }
      }
    }
  }
}