- This filter acts only on Z3950 present requests, and let all
- other types of packages and requests pass untouched. It's use is
- twofold: blocking Z3950 present requests, which the backend
- server does not understand and can not honor, and transforming
- the present syntax and elementset name according to the rules
- specified, to fetch only existing record formats, and transform
- them on the fly to requested record syntaxes.
+ This filter acts on Z39.50 present requests and Z39.50 search requests,
+ and let all other types of packages and requests pass untouched. Its
+ use is twofold: blocking Z39.50 present/search requests that the backend
+ server does not understand or can not honor, and transforming the present
+ syntax and elementset name according to the rules specified, to fetch
+ only existing record formats, and transform them on the fly to requested
+ record syntaxes.