[Koha] Question about author sorting

[Robin Sheat]

As some of you know, I'm in the process of implementing Elasticsearch
support into Koha. Katrin pointed out that there's a bit of an
irregularity with the author sorting, but I'm not sure if it's wrong as
such. So I'm after a bit of input into what actual people would expect
or would like.

Imagine you have a book, with multiple authors:

Title of Book
Andrews, A ; Matthews, M ; Zimmermann, Z

You do a search for "title", sorted by author A->Z, and get results,
with "Title of Book" at the top due to "Andrews, A."

You then sort it by author Z->A, and get "Title of Book" at the top
again, due to "Zimmerman, Z."

There is clearly logic behind it doing this, but is it the right thing
to do? If not, what do you think an appropriate alternative would be?

-- 
Robin Sheat
Catalyst IT Ltd.
✆ +64 4 803 2204
GPG: 5FA7 4B49 1E4D CAA4 4C38  8505 77F5 B724 F871 3BDF
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