XDB服务，是指监听器要建立针对XMLDB的监听服务，才能够监听和获得连接握手。
在监听中，示范如下：
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=primary)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.5.0 - Production
Start Date 11-JUL-2011 12:02:07
Uptime 0 days 0 hr. 0 min. 23 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /oracle/10201/network/admin/listener.oraListener Log File
/oracle/10201/network/log/listener.logListening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=primary)(PORT=1521)))
Services Summary...
Service "orcl" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orcl_XPT" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "test" has 1 instance(s).
Instance "test", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully