Description
int
yaz_sort ( resource id, string criteria)
This function sets sorting criteria and enables Z39.50 Sort.
Call this function before
yaz_search().
Using this function alone does not have any effect. When used 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 (yaz_present(). The parameter
criteria takes the form
field1 flags1 field2 flags2 ...
where field1 specifies the primary attributes for sort, field2 seconds,
etc.. The field specifies either a 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 sequence of the following
characters which may not be separated by any white space.
Sort Flags
- a
Sort ascending
- d
Sort descending
- i
Case insensitive sorting
- s
Case sensitive sorting
Example 1. Sort Criterias
To sort on Bib1 attribute title, case insensitive,
and ascending you would use the following sort criteria:
If the secondary sorting criteria should be author, case sensitive
and ascending you would use:
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