This function sets sorting criteria and enables Z39.50
Sort. Call this function before
yaz_search(). Using this function alone doesn't have
any effect. When in conjunction with
yaz_search(), a Z39.50 Sort will be sent after a
search response has been received and before any records are
retrieved with Z39.50 Present. The
criteria takes the form
field1 flags1 field2
flags2 ...
where field1 specifies primary attributes for sort,
field2 seconds, etc.. The field specifies either numerical
attribute combinations consisting of type=value pairs
separated by comma (e.g. 1=4,2=1) ;
or the field may specify a plain string criteria (e.g. title. The flags is a sequnce of the
following characters which may not be separated by any white
space.
Sort Flags
Sort ascending
Sort descending
Case insensitive sorting
Case sensitive sorting