Rebuilding Oracle XdB components

--XDB Component state ：
SQL> selectcomp_id,comp_name,version,status from dba_registry;
COMP_ID COMP_NAME VERSION STATUS

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XDB Oracle XML Database 11.2.0.4.0 INVALID
-- uninstall XDB：
SQL> @?/rdbms/admin/catnoqm.sql
-- install XDB
SQL>shutdown immediate
SQL>startup
SQL> @?/rdbms/admin/catqm.sql oracle SYSAUX TEMP YES
SQL> @?/rdbms/admin/utlrp.sql
verification ： XDB It's normal ：
SQL> selectcomp_id,comp_name,version,status from dba_registry;
COMP_ID COMP_NAME VERSION STATUS

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XDB Oracle XML Database 11.2.0.4.0 VALID