+for the MARC bibliographic records:
+
+grs1 - uses the Zebra GRS-1 filter, available
+ for legacy support
+dom - uses the DOM XML filter; offers improved
+ functionality.
+
+Bibliographic indexing mode);
+ $msg .= _add_valid_values_disp('BIB_INDEX_MODE', $valid_values);
+ $config{'BIB_INDEX_MODE'} = _get_value('BIB_INDEX_MODE', $msg, $defaults->{'BIB_INDEX_MODE'}, $valid_values, $install_log_values);
+
+
+ $msg = q(
+Koha can use one of two different indexing modes