メタデータ名 component
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.0500000 38.4500000, 140.0562500 38.4500000, 140.0562500 38.4541667, 140.0500000 38.4541667, 140.0500000 38.4500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral