{
  "id": "gml_id",
  "name": "GML object identifier (gml:id)",
  "status": "draft",
  "doc": "Value of the gml:id attribute, the handle of an object in a Geography Markup Language (GML) document, such as a feature or a geometry in a WFS response. Its XML Schema type is ID, so the value is an XML NCName (it starts with a letter or an underscore and has no colon or space) and it is unique only within the document that contains it. It serves internal cross-references and is not a persistent identifier; GML carries stable identifiers in gml:identifier instead. GeoServer builds it from the feature type name and a number, as in states.1. GDAL reads the attribute into a string field called gml_id, so tables exported from GML or WFS data with ogr2ogr or QGIS keep it as a column. The regexp covers the NCName characters of the Basic Multilingual Plane.",
  "parent": {
    "type": "id"
  },
  "categories": [
    {
      "id": "geo",
      "name": "Geographic identifiers"
    }
  ],
  "langs": [
    {
      "id": "common",
      "name": "Common to most languages"
    }
  ],
  "is_pii": false,
  "classification": "identifier",
  "regexp": "^[A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD][A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD\\-.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040]*$",
  "examples": [
    {
      "value": "states.1",
      "description": "GeoServer feature of the topp:states sample layer"
    },
    {
      "value": "states.1.1",
      "description": "GeoServer geometry of feature states.1 in GML 3.2 output"
    },
    {
      "value": "myFeature.1",
      "description": "GDAL GML driver documentation"
    },
    {
      "value": "table1-1",
      "description": "GDAL GML driver documentation, WFS join"
    },
    {
      "value": "topp:states.1",
      "valid": false,
      "description": "an NCName has no colon; topp is the namespace prefix of the feature type"
    },
    {
      "value": "1.1",
      "valid": false,
      "description": "an NCName cannot start with a digit"
    },
    {
      "value": "states 1",
      "valid": false,
      "description": "an NCName has no space"
    }
  ],
  "links": [
    {
      "type": "doc",
      "url": "https://gdal.org/en/stable/drivers/vector/gml.html"
    },
    {
      "type": "doc",
      "url": "https://schemas.opengis.net/gml/3.2.1/gmlBase.xsd"
    },
    {
      "type": "doc",
      "url": "https://www.w3.org/TR/xml-names/#NT-NCName"
    }
  ],
  "translations": {
    "ru": {
      "name": "Идентификатор объекта GML (gml:id)"
    }
  },
  "type": "datatype"
}