メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.3500000 24.7416667, 125.3562500 24.7416667, 125.3562500 24.7458334, 125.3500000 24.7458334, 125.3500000 24.7416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral