Change LoC subauthority base urls?

[rotated8]

Currently, LoC authorities use one of four base urls to limit a search to their subauthorities. These base urls start with "cs:", and produce query urls like https://id.loc.gov/search/?q=Emory&q=cs%3Ahttp%3A%2F%2Fid.loc.gov%2Fauthorities%2Fnames&format=json and https://id.loc.gov/search/?q=france&q=cs%3Ahttp%3A%2F%2Fid.loc.gov%2Fvocabulary%2Fcountries&format=json via the Loc::GenericAuthority#build_query_url function

However, cs appears to be a non-documented feature. In the docs, scheme seems to be the documented equivalent. Compare using cs and using scheme in a search for Emory against the LCNAF, and using cs and using scheme in a search for France against the MARC List for Countries.

My suggestion is to change from using cs to scheme.