メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.785149218586 35.4129785403812, 136.78269542134 35.4130986856389, 136.782678829741 35.4128698048459, 136.785135262091 35.4127547381103, 136.785149218586 35.4129785403812)) ^^http://www.opengis.net/ont/geosparql#wktLiteral