: OffsetPointerhttps://triplydb.com/w3c/ptr/# Create a prefix for https://triplydb.com/w3c/ptr/# Hit Enter to save Double click to create a prefix | rdfs:subClassOf | : SinglePointerhttps://triplydb.com/w3c/ptr/# Create a prefix for https://triplydb.com/w3c/ptr/# Hit Enter to save Double click to create a prefix | graph:default |