Abstract place-holder in a schema to use a non-abstract location element (geometry, feature, address) defined by an external standard. Non-abstract geospatial elements that declare substitutionGroup="gs:Location" may take the place of this element in an XML data instance document to indicate a location in various ways. These include Address, RelativeLocation, (Multi)Geometries, Positions, Points and Areas of Interest, Route WayPoints, geospatial Features and collections, and references thereto.