json_schema: {
      "id": "https://almanak.github.io/schemas/relation.json",
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Relation",
      "description": "Skema for relationer.",
      "_meta": {
          "indexedProperties": [
              "id",
              "subject_id",
              "subject_domain",
              "object_id",
              "object_domain",
              "from_date",
              "to_date"
          ],
          "systemProperties": [
              "uuid",
              "id",
              "subject_id",
              "subject_domain",
              "created",
              "created_by",
              "updated",
              "updated_by"
          ],
          "fulltextProperties": [],
          "autocompleteProperties": []
      },
      "properties": {
          "uuid": {
              "type": "string",
              "title": "Unik universal identifikation",
              "description": "UUID1. Assigned by system",
              "pattern": "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}"
          },
          "id": {
              "type": "string",
              "title": "RelationsID",
              "description": "Assigned by system",
              "pattern": "^[0-9]{9}$"
          },
          "created": {
              "type": "string",
              "format": "date-time",
              "title": "Skabt",
              "description": "Datetime for skabelse af metadata-ressourcen"
          },
          "created_by": {
              "type": "string",
              "maxLength": 255,
              "title": "Skabt af",
              "description": "Brugernavn/ID p\u00e5 skaber/oploader af metadata-ressourcen"
          },
          "updated": {
              "type": "string",
              "format": "date-time",
              "title": "Senest opdateret",
              "description": "Datetime for seneste opdatering af ressourcen"
          },
          "updated_by": {
              "type": "string",
              "maxLength": 255,
              "title": "Senest opdateret af",
              "description": "Brugernavn p\u00e5 seneste opdaterer af metadata-ressourcen"
          },
          "status": {
              "type": "string",
              "enum": [
                  "validated",
                  "machine-generated",
                  "user-generated"
              ],
              "title": "Status",
              "default": "user-generated"
          },
          "relation_class": {
              "type": "string",
              "maxLength": 255,
              "title": "Relationsklasse",
              "description": "Den klasse, som relationen tilh\u00f8rer"
          },
          "relation_name": {
              "type": "string",
              "maxLength": 255,
              "title": "Relationsnavn",
              "description": "Navnet p\u00e5 relationstypen"
          },
          "label": {
              "type": "string",
              "maxLength": 255,
              "title": "Label",
              "description": "Den streng, som entiteten repr\u00e6senteres med"
          },
          "subject_id": {
              "type": "string",
              "title": "RessourceID",
              "description": "9-cifret l\u00f8benummer specifikt for resourcetypen",
              "maxLength": 9,
              "pattern": "^[0-9]{9}$"
          },
          "subject_domain": {
              "type": "string",
              "title": "Ressourcetype",
              "enum": [
                  "events",
                  "organisations",
                  "people",
                  "places",
                  "concepts",
                  "literal value"
              ]
          },
          "object_id": {
              "type": "string",
              "title": "RessourceID",
              "description": "9-cifret l\u00f8benummer specifikt for resourcetypen",
              "maxLength": 9,
              "pattern": "^[0-9]{9}$"
          },
          "object_domain": {
              "type": "string",
              "title": "Ressourcetype",
              "enum": [
                  "events",
                  "organisations",
                  "people",
                  "places",
                  "concepts",
                  "literal value"
              ]
          },
          "from_date": {
              "type": "string",
              "format": "date",
              "title": "Startdato (\u00e5\u00e5\u00e5\u00e5-mm-dd)",
              "pattern": "^([0-9]{4})(-([0-9]{2}))?(-([0-9]{2}))?$"
          },
          "to_date": {
              "type": "string",
              "format": "date",
              "title": "Slutdato (\u00e5\u00e5\u00e5\u00e5-mm-dd)",
              "pattern": "^([0-9]{4})(-([0-9]{2}))?(-([0-9]{2}))?$"
          },
          "sources": {
              "type": "array",
              "title": "Kilder",
              "items": {
                  "type": "string"
              }
          }
      }
  }