SQL> @CheckXMLInCLOB

Connected.
+--------------------------------------+
| Checking: --> Tablespaces.xml         |
+--------------------------------------+
No errors found in XML Document...
+--------------------------------------+
| Checking: --> Tablespaces_ERROR.xml         |
+--------------------------------------+
ORA-20100: Error occurred while parsing: End tag does not match start tag
'Tablespace'.

PL/SQL procedure successfully completed.