Install XML DB on Oracle 11gR2

This note is copied from the Metalink Note and talks about removal and re-install of an XML DB on a 11gR2 Oracle Database.
This is more for my reference and sorry for duplicating ....

XDB Removal

The catnoqm.sql script drops XDB.

SQL> spool xdb_removal.log
SQL> set echo on;
SQL> connect / as sysdba
SQL> shutdown immediate;
SQL> startup
SQL> @?/rdbms/admin/catnoqm.sql
SQL> spool off;


XDB Installation

The catqm.sql script requires the following parameters be passed to it when run:

A. XDB user password
B. XDB user default tablespace
      (Any tablespace other than SYSTEM, UNDO and TEMP can be specified.
       The specified tablespace must already exist prior to running the script.)
C. XDB user temporary tablespace
D. SecureFiles = YES or NO
      (If YES is specified, the XDB repository will use SecureFile storage.
       If NO is specified, LOBS will be used.
       To use SecureFiles, compatibility must be set to 11.2.
       The tablespace specified for the XDB repository must be using
       Automatic Segment Space Management (ASSM) for SecureFiles to be used.)

Therefore the syntax to run catqm.sql is the following:
SQL> catqm.sql A B C D

For Example:
SQL> @?/rdbms/admin/catqm.sql XDB XDB TEMP YES

## IMPORTANT: You must shutdown and restart the database between removal and reinstall ##

SQL> spool xdb_install.log
SQL> set echo on;
SQL> connect / as sysdba
SQL> shutdown immediate;
SQL> startup;
SQL> @?/rdbms/admin/catqm.sql <XDB pwd> <XDB default tbs> <XDB temporary tbs> <SecureFiles = YES/NO>
SQL> @?/rdbms/admin/utlrp.sql
SQL> spool off

Verify XDB Installation

spool xdb_status.txt

set echo on;
connect / as sysdba
set pagesize 1000
col comp_name format a36
col version format a12
col status format a8
col owner format a12
col object_name format a35
col name format a25

-- Check status of XDB

select comp_name, version, status
from dba_registry
where comp_id = 'XDB';

-- Check for invalid objects owned by XDB

select owner, object_name, object_type, status
from dba_objects
where status = 'INVALID'
and owner = 'XDB';

spool off;