メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2500000 24.7250000, 125.2562500 24.7250000, 125.2562500 24.7291667, 125.2500000 24.7291667, 125.2500000 24.7250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral