Create a plugin or menu item to discover non-local usage of an ontology class

[cmungall]

Often I would like to know how an ontology object has been used outside my own ontology. E.g if I am considering obsoleting I want to know what I'd be breaking.

We have the Usage tab, but that is of course local.

What about something like the Usage Tab that can query:

• a SPARQL endpoint such as the OBO OntoBee endpoint
• APIs such as BioPortal

And return a list of usages - ideally same format as in the usage tab, but even just a list of ontologies or terms that use it would be super-useful