No 'https://w3id.org/function/ontology#name' found for parameter 'http://users.ugent.be/~bjdmeest/function/grel.ttl#output_array'

[tirrolo]

Good morning,

I am trying to specify a function returning an array. To do so, I added the following return type to the definition of my function:

  fno:returns ( grel:output_array )

However, I get the following error:

No 'https://w3id.org/function/ontology#name' found for parameter 'http://users.ugent.be/~bjdmeest/function/grel.ttl#output_array'
be.ugent.idlab.knows.functions.agent.functionModelProvider.fno.exception.ParameterNameDescriptionNotFoundException: No 'https://w3id.org/function/ontology#name' found for parameter 'http://users.ugent.be/~bjdmeest/function/grel.ttl#output_array'

Note that, in the ontology, a property name is actually defined for the output type grel:output_array.

Is it currently possible to specify functions returning arrays in RMLMapper?