メタデータ名
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.0812500 42.9750000, 142.0875000 42.9750000, 142.0875000 42.9791667, 142.0812500 42.9791667, 142.0812500 42.9750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral