New delimiters?

After @jgm reporting weird delimiter behavior @bwiernik posted this suggestion:

Delimiter	Example	Current name	New name
Delimiter between cites	Jones 1992, p. 123; Smith 1994	delimiter on cs:citation	delimiter on cs:citation
Delimiter between cite and locator	Jones 1992, p. 123	delimiter on cs:group	delimiter on cs:group
Delimiter between collapsed cites	Jones 1992, 1994; Smith 1994	Not explicit; will pick up group delimiter if citations are sorted	collapse-delimiter
Delimiter between collapsed cites, if there is a locator	Jones 1992, p. 123; 1994, 1996; Smith 1994	hack of after-collapse-delimiter	collapse-with-locator-delimiter
Delimiter between grouped cites, even if not collapsed (e.g., citations by the same author)	Jones 1992, p. 123, Jones 1994; Smith 1994	cite-group-delimiter	cite-group-delimiter
Delimiter used after a collapsed cite before the next cite (typically used if , is the regular delimiter and the collapse delimiter, but ; should be used after collapse)	Jones 1992, p. 123, 1994; Smith 1994, Wilson	after-collapse-delimiter	after-collapse-delimiter
Delimiter between year suffixes	Jones 1999a, b	year-suffix-delimiter	year-suffix-delimiter

I think adding collapse-delimiter and collapse-with-locator-delimiter explicitly makes the most sense and avoids trying to be too clever.

Inherited default values for the delimiters

• delimiter on cs:citation -> cite-group-delimiter -> collapse-delimiter -> collapse-with-locator-delimiter
• delimiter on cs:citation -> after-collapse-delimiter
• , -> year-suffix-delimiter

_Originally posted by @bwiernik in https://github.com/citation-style-language/test-suite/issues/36#issuecomment-667126525_

[denismaier]

To clarify: My question was not about your comment. I was just wondering whether we should also add cite-group-with-locator-delimiter given we already have collapse-with-locator-delimiter.

[Circeus]

There’s a final use case that is overlooked by this proposal. The delimiter between years when collapse="year-suffix" is used, that is “Jones, 1999a, b, 2000a, b”