This might be somewhat of a broad question to ask but I'll try it anyway,
I would like to incorporate a REST API into a virtual graph, so results that come from a REST API converted to RDF and then in general queryable through SPARQL.
E.g. I have a set of data about buildings with ID's in my graphstore, I'd like to have the ID as a parameter to the REST Api and the result for example building details incorporated into the knowledge graph.
If the question is not clear let me know as well