Sort criterion expression
The available sort criteria are:
relevancydate ascending/date descendingqrefield ascending/field descending, where you replace field with the name of a sortable field in your index (for example, criteria="size ascending").You can specify multiple sort criteria to be used in the same request by separating them with a comma (for example, criteria="size ascending, date ascending" ).
Parses a criterion expression and return a list of
SortCriterion