{
  "fields": [{
      "name": "act_id",
      "constraints": {
        "required": true,
        "unique": true,
        "pattern": "A[0-9]{5}"
      }
    },
    {
      "name": "agent",
      "constraints": {
        "required": true,
        "pattern": "(P|I)[0-9]{4}"
      }
    },
    {
      "name": "action",
      "constraints": {
        "required": true,
        "pattern": "AT[0-9]{2}"
      }
    },
    {
      "name": "act_object",
      "constraints": {
        "required": false
      }
    },
    {
      "name": "act_target",
      "constraints": {
        "required": false
      }
    },
    {
      "name": "start",
      "constraints": {
        "required": false,
        "min-length": 4
      }
    },
    {
      "name": "end",
      "constraints": {
        "required": false,
        "min-length": 4
      }
    }, {
      "name": "substantial_discussion",
      "constraints": {
        "required": false
      }
    }, {
      "name": "source",
      "constraints": {
        "required": true
      }
    }, {
      "name": "page",
      "constraints": {
        "required": false
      }
    }, {
      "name": "source_status",
      "constraints": {
        "required": false,
        "pattern": "(\W?|[1-3])"
      }
    }, {
      "name": "commentary",
      "constraints": {
        "required": false
      }
    },
    {
      "name": "note",
      "constraints": {
        "required": false
      }
    },
    {
      "name": "id_lang",
      "constraints": {
        "required": true,
        "pattern": "en"
      }
    },
    {
      "name": "created",
      "constraints": {
        "required": true,
        "type": "http://www.w3.org/2001/XMLSchema#date"
      }
    },
    {
      "name": "created_by",
      "constraints": {
        "required": true,
        "pattern": "[A-Z]{2}"
      }
    },
    {
      "name": "last_modified",
      "constraints": {
        "required": true,
        "type": "http://www.w3.org/2001/XMLSchema#date"
      }
    },
    {
      "name": "last_modified_by",
      "constraints": {
        "required": true,
        "pattern": "[A-Z]{2}"
      }
    }
  ],
  "primaryKey": "act_id",
  "missingValues": ["", "NULL"]
}