query_rewrite
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## Name

query_rewrite — Metaproxy RPN Query Rewrite Module

## DESCRIPTION

This module allows Z39.50 Type-1 queries to be arbitrarily rewritten using an XSLT stylesheet to specify the rewrite rules. This can be useful for several purposes, including the provision of index aliases (e.g. BIB-1 access-point 1, personal name, rewritten to access-point 1003, author); and protecting fragile Z39.50 servers from attribute combinations that cause them problems.

The Type-1 query is translated into an XML representation, transformed by an XSLT stylesheet whose path is specified in the filter configuration's `<xslt>` element, then translated back into a Type-1 query.

### Describe the XML representation.

## SCHEMA

# Metaproxy XML config file schemas
#
# Copyright (C) Index Data
# See the LICENSE file for details.
namespace mp = "http://indexdata.com/metaproxy"
filter_query_rewrite =
attribute type { "query_rewrite" },
attribute id { xsd:NCName }?,
attribute name { xsd:NCName }?,
element mp:xslt {
attribute stylesheet { xsd:string }
}?,
element mp:charset {
attribute from { xsd:string }?,
attribute to { xsd:string }?
}?

## EXAMPLES

A typical configuration looks like this:

       <filter type="query_rewrite">
        <xslt stylesheet="pqf2pqf.xsl">
       </filter>

## SEE ALSO

metaproxy(1)

## COPYRIGHT

Copyright (C) 2005-2026 Index Data

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