From bootstrap/en/modules/opac-advsearch.tt: [% IF ( numbersphr) %] <option value="sn,phr">Standard number</option> [% ELSE %] <option value="sn">Standard number</option> [% END %] <option value="sn">Standard number</option> The patron cannot be expected to know what the difference is between the two "Standard number" entries. And if numbersphr is not on, there isn't any difference.
I've changed the title of this bug to reflect the fact that it is not specific to Bootstrap. It looks to me like the change introduced in Bug 9395 was intended to remove the "sn" option altogether in cases where the system is configured to use "sn,phr" by default. Can anyone confirm?
*** This bug has been marked as a duplicate of bug 10936 ***