Need help to validate if one of the incoming XML tag contains serialized data or not. If ir doesn't contain then have to thow an user defined exception. This has to be achieved using ESQL.
example :
<input_data>
<source>ABCD</source>
<key_data>incoming serialized data</key_data>
</input_data>
here Key_data should be validated to check if it contains anything other than serialized data.