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How to check a Variables (is exists, is not null)?

841866Mar 15 2011 — edited Feb 27 2020
Helllo!

A BPEL process invoke a WebService and receive a some kind of response.

Like
<response>
<PersonID>p1-guid</PersonID>
<Error></Error>
</response>

And there are 2 situations i need to check:
1.How to check if <PersonID> element exist in response? (its not a mandatory element)
2.How to check if <PersonID> not null? (when elements exists, but its empty)

Thank you.
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Locked on Apr 13 2011
Added on Mar 15 2011
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