+ <virtual>
+ <database>loc</database>
+ <target>z3950.loc.gov:7090/voyager</target>
+ </virtual>
+ <virtual>
+ <database>all</database>
+ <target>localhost:9999/Default</target>
+ <target>localhost:9998/Slow</target>
+ <target>z3950.loc.gov:7090/voyager</target>
+ </virtual>
+ </filter>
+ <filter type="log">
+ <message>M</message>
+ </filter>
+ <filter type="multi">
+ <hideunavailable/>
+ <mergetype>roundrobin</mergetype>