How to Create XML from Oracle Triggers ?

[@satyannarayana08421]

i am unable to do insert and facing with below error: One error saving changes to table "DW_USER"."XML_DATA_TEST": Row 1: ORA-64464: XML event error ORA-19202: Error occurred in XML processing In line 1 of orastream: LPX-00254: invalid XML declaration ORA-06512: at "DW_USER.XML_TRIGGER_TEST", line 2 ORA-04088: error during execution of trigger 'DW_USER.XML_TRIGGER_TEST' ORA-06512: at line 1 Can you please help me on this. Please share the syntax and dml and ddl statements used in the demo

[@satyannarayana08421]

INSERT INTO XML_DATA_TEST VALUES (10,'ARUN') Error report - SQL Error: ORA-64464: XML event error ORA-19202: Error occurred in XML processing In line 1 of orastream: LPX-00254: invalid XML declaration ORA-06512: at "DW_USER.XML_TRIGGER_TEST", line 2 ORA-04088: error during execution of trigger 'DW_USER.XML_TRIGGER_TEST' 64464. 00000 - "XML event error" *Document: NO *Cause: The specified error occurred in XDB. *Action: Correct the error or contact Oracle Support Services.