Investigate format for citation export

[sfarnel]

We will need to be able to export metadata that is usable across citation formats. This will be for Jupiter and, by extension, Blacklight (see ualbertalib/discovery#981)

We did some early investigation into RIS that we might be able to build on: https://docs.google.com/document/d/19py25Hotyq1E24UPSkLjJKLWb4Q6D0cElobCFeHoUAo/edit?usp=sharing

[sfarnel]

Explore moving citation data currently captured in Source and then removing Source as property from the form (though leave for batch ingest).

[anayram]

ERA report including source field content available, created for #449

[sfarnel]

Thanks @anayram what we would be looking at here, however, is how to cite the item i nERA which would require pulling on some different elements

[anayram]

@weiweishi we are going to work on a mapping between RIS and ERA fields. What would it be more useful for you: mapping between RIS and Solr fields or RIS and predicates?