cdt

https://w3id.org/cdt/ link to namespace URI +1+1

http://w3id.org/lindt/custom_datatypes# link to namespace URI +1+1

http://w3id.org/awslabs/neptune/SPARQL-CDTs/ link to namespace URI +1+1

https://w3id.org/lindt/custom_datatypes# link to namespace URI +1+1

Add alternative URI
ttl xml rdfa sparql txt json jsonld vann | lov | prefix.cc