メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.2375000 34.7291667, 134.2437500 34.7291667, 134.2437500 34.7333333, 134.2375000 34.7333333, 134.2375000 34.7291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral