メタデータ名 indexItems
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.3687500 38.3958334, 140.3750000 38.3958334, 140.3750000 38.4000000, 140.3687500 38.4000000, 140.3687500 38.3958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral