{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "corporate_information_pages": {
      "$ref": "#/definitions/guid_list"
    },
    "organisations": {
      "description": "All organisations linked to this content item. This should include lead organisations.",
      "$ref": "#/definitions/guid_list"
    },
    "parent": {
      "description": "The parent content item.",
      "maxItems": 1,
      "$ref": "#/definitions/guid_list"
    }
  }
}

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "corporate_information_pages": {
      "$ref": "#/definitions/guid_list"
    },
    "organisations": {
      "description": "All organisations linked to this content item. This should include lead organisations.",
      "$ref": "#/definitions/guid_list"
    },
    "parent": {
      "description": "The parent content item.",
      "maxItems": 1,
      "$ref": "#/definitions/guid_list"
    },
    "primary_publishing_organisation": {
      "description": "The organisation that published the page. Corresponds to the first of the 'Lead organisations' in Whitehall, and is empty for all other publishing applications.",
      "$ref": "#/definitions/guid_list",
      "maxItems": 1
    }
  }
}

Add `primary_publishing_organisation` to corporate info
Add `primary_publishing_organisation` to corporate info
