- From: Larry E. Dixson <ldix@loc.gov>
- Date: Tue, 30 Mar 2004 08:42:32 -0500 (EST)
- To: www-zig@w3.org, ZNG@loc.gov
LC has been working with Index Data to create a front end for
our Z39.50 server that would provide us with a way to enhance
our server's performance. Index Data has created, and we have
installed, what is essentially a Z39.50 to Z39.50 gateway by
using two of their popular toolkits: YAZ and an enhanced
version of YAZ++. For more information about these toolkits,
see the following:
http://www.indexdata.dk/yaz/
http://www.indexdata.dk/yazplusplus/
(note: LC is not running the current public version of YAZ++)
In addition to enhancing our server's performance with a load
balancing mechanism (between multiple back end ports), inactivity
timers, enhanced initialization throughput to our server, query
and record caching, a way to filter problematic Bib-1 attributes,
and configurable thresholds to better control abusive client
behavior, the front end also provides support for the following
new services:
- support for delivery of XML record syntax (MARCXML is
the default).
- Mods and Dublin Core records can be requested using
elementSetNames parameter values of "mods" or "dc".
- support for SRW and SRU via a gateway to our Z39.50
server (back end). (Our base URL for SRW/SRU is
http://z3950.loc.gov:7090/voyager?)
FYI, the next YAZ++ public release will contain all of the
functionality of the version that we are currently running and
will be under a General Public License.
Please contact me if you have any questions.
Larry
------------------------------------------------------------
Larry E. Dixson Internet: ldix@loc.gov
Network Development and MARC
Standards Office, LM639
Library of Congress Telephone: (202) 707-5807
Washington, D.C. 20540-4402 Fax: (202) 707-0115
Received on Tuesday, 30 March 2004 08:42:44 UTC