Xml Publisher ( How to Delete Data Definition & Template from Back end )

Script for deleting the datadefinition
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BEGIN
XDO_DS_DEFINITIONS_PKG.DELETE_ROW('INV','<DataDefinationCode>');  
END;
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script for deleting the template 
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BEGIN
XDO_TEMPLATES_PKG.DELETE_ROW('INV','<DataDefinationCode>');
END