メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.1125000 34.8208334, 136.1187500 34.8208334, 136.1187500 34.8250000, 136.1125000 34.8250000, 136.1125000 34.8208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral