メタデータ名 dataset
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.1875000 34.8166667, 136.1937500 34.8166667, 136.1937500 34.8208334, 136.1875000 34.8208334, 136.1875000 34.8166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral