add "archival-collection" item type

[bdarcus]

See https://github.com/citation-style-language/zotero-bits/issues/27

[denismaier]

Just to be clear: We are talking about the archival-collection as a whole, not a specific item found in a collection?

[bdarcus]

Yes.

[bdarcus]

I do think there's a reasonable question(, if this is really needed, maybe it's a more general concept like "collection"?

[bwiernik]

This is definitely needed. Art History especially cites curated collections and their catalogues often, with unique citation needs.

This is a proposal and need for a variable archive_collection to go with archive and archive_location. Think:

• archive: Museum name
• archive_collection: Name of collection the item is part of
• archive_location: Box and folder numbers

To avoid confusion, I think this item type should be called collection.