Ability to load different ontologies

[dannylamb]

Transferred from Islandora/documentation#485. Please see that issue for the original conversation.

Title (Goal)	RDF UI: Ability to load different ontologies
Primary Actor	Repository admin
Scope	access
Level	High for extending RDF UI
Story	As a repository admin, I would like to add RDF-based ontologies (including custom/local ones) to use through the RDF UI to map to the fields of Islandora bundles/entity types. Ideally, there would be an option to load ontologies by a public URL. These ontologies would be populated in RDF UI which will allow me to lookup and select the appropriate class/predicate to map the fields to.

Remarks:

• Have PCDM, DCTERMS as default ontologies already loaded and ready to use
• Possibly have BIBFRAME as a default ontology already loaded and ready to use

[DonRichards]

@dannylamb Is this still a thing?