メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.3625000 24.7708334, 125.3687500 24.7708334, 125.3687500 24.7750000, 125.3625000 24.7750000, 125.3625000 24.7708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral