enabledthe sorting can be switched off completely (default value is
true). The elements
<field>define the Solr fields, according to which the sorting can be done. The order of the listing corresponds to the displayed order. For each configured field, an ascending and descending option is automatically displayed.
RANDOMare static terms for which no ascending and descending option is provided.
descendingare used by default. However, the attributes
dropDownDescMessageKeycan be used to define a custom value. In the example above, this has been done for the title, where alternatively "A-Z" and "Z-A" are displayed.
SORT_YEARPULISH;SORT_TITLE. This means that the hits are first sorted by
SORT_YEARPUBLISH. The records that do not contain the metadata are listed below according to
<static>can be used to always place certain works on top based on the presence of a certain index field. The fields configured here are applied in the sort order before the normal sort fields and are not visible to the user.