メタデータ名 dsd
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.6875000 43.8833333, 141.6937500 43.8833333, 141.6937500 43.8875000, 141.6875000 43.8875000, 141.6875000 43.8833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral