+ For XML if no element set is given or element has value "marcxml",
+ MARCXML is returned (each of the 24 dummy records converted from
+ ISO2709 to XML). For element set OP, OPAC XML is returned.
+ </para>
+ <para>
+ yaz-ztest may also return predefined XML records (for testing).
+ This is enabled if <literal>YAZ_ZTEST_XML_FETCH</literal> environment
+ variable is defined. A record is fetched form a file (one record per file).
+ The path for the filename is
+ <replaceable>F</replaceable><replaceable>E</replaceable><literal>.</literal><replaceable>d</replaceable><literal>.xml</literal>
+ where <replaceable>F</replaceable> is the YAZ_ZTEST_XML_FETCH value
+ (possibly
+ empty), <replaceable>E</replaceable> is element-set,
+ <replaceable>d</replaceable> is record position (starting from 1).
+ </para>
+ <para>