+ <para>
+ From Metaproxy version 1.3.26 and onwards the backend conversion ma
+ also use <ulink url="&url.usemarcon;">USEMARCON</ulink>.
+ If USEMARCON is enabled, the <literal>backend</literal> may include
+ a <literal>usemarcon</literal> element with two attributes:
+ <literal>stage1</literal> and <literal>stage2</literal> that points to
+ conversion files as interpreted by USEMARCON. One or both must be given.
+ </para>
+ </refsect1>
+
+ <refsect1><title>SCHEMA</title>
+ <para>
+ Schema is in two parts.. One for the filter itself and one for the
+ retrieval info.
+ </para>
+ <literallayout>
+ <xi:include
+ xi:href="../xml/schema/filter_record_transform.rnc"
+ xi:parse="text"
+ xmlns:xi="http://www.w3.org/2001/XInclude" />
+ </literallayout>
+ <literallayout>
+ <xi:include
+ xi:href="../xml/schema/retrievalinfo.rnc"
+ xi:parse="text"
+ xmlns:xi="http://www.w3.org/2001/XInclude" />
+ </literallayout>