{
  "name": "approval",
  "label": "approval",
  "description": "Approval Model representing a single workitem in approval workflow",
  "attributes": [
    {
      "name": "id",
      "description": "Combination of workitemid and userid",
      "type": "String",
      "mandatory": true,
      "key": true
    },
    {
      "name": "provider",
      "description": "Selector of provider implementation communicating with backend",
      "type": "String",
      "mandatory": true
    },
    {
      "name": "state",
      "description": "Action to set when approving or rejecting this workitem",
      "type": "String",
      "mandatory": true,
      "enum": [
        "open",
        "approved",
        "rejected"
      ]
    },
    {
      "name": "comment",
      "description": "Reason to set when approving of rejecting this workitem",
      "type": "String",
      "mandatory:": false
    },
    {
      "name": "aclEntries",
      "description": "Determines who may see and modify this workitem",
      "type": "String Array",
      "mandatory": true
    },
    {
      "name": "approver",
      "description": "Metadata of approver and overall approval",
      "type": "approver[]",
      "mandatory": true
    },
	{
	  "name": "current",
	  "description": "Index of current step in approver array, zero based.",
	  "type": "Integer"
	},
    {
      "name": "requester",
      "description": "Information on requester of approval",
      "type": "requester",
      "mandatory": true
    },
    {
      "name": "items",
      "type": "item[]"
    },
    {
      "name": "header",
      "description": "General information",
      "type": "header",
      "mandatory": true
    },
    {
      "name": "attachments",
      "description": "attachments incl. external URL",
      "type": "attachment[]",
      "mandatory": false
    }
  ]
}