1 <!-- $Id: introduction.xml,v 1.4 2004-04-21 08:16:42 adam Exp $ -->
2 <chapter id="introduction"><title>Introduction</title>
4 The <ulink url="http://www.indexdata.dk/yazproxy/">YAZ Proxy</ulink> is
5 highly configurable and can be used in a number of different
6 applications, ranging from debugging Z39.50-based applications
7 and protecting overworked servers, to improving the performance of
8 stateless WWW/Z39.50 gateways. Among other features, it includes:
18 SRU/SRW server function, to allow any Z39.50 server to also support
19 the <ulink url="http://www.loc.gov/z3950/agency/zing/">ZiNG</ulink>
26 Load balancing across multiple backend servers
32 Session-sharing and pre-initialization to improve performance
33 in servers with expensive session initialization
39 Configurable request filtering, to keep bad requests from
46 XML support -- MARC records can be converted to MARCXML, and
47 XSLT-transformations allow the proxy to support arbitrary
48 retrieval schemas in XML
54 Load governor function limits requests from aggressive
61 Efficient multiplexing software enables small memory footprint
62 and very high performance
69 <title>Licensing</title>
71 The proxy application and the proxy library is covered by the
72 <link linkend="gpl">GPL</link>.
76 <section id="support">
77 <title>Support</title>
79 Configuration and installation assistance and ongoing support is
80 available for the YAZ Proxy.
81 For further information about support or licensing options, please
82 contact David Dorman in the
83 US (dorman at indexdata.com, 860-346-1237 or toll free 866-489-1568)
84 or Sebastian Hammer in Denmark (quinn a indexdata.com, or +45 3341 0100)
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