How to read the tag values sent by PCo to MII transaction

Question

Hi everybody,
I have an Agent created inside PCo and its listening to a data server. I have also created a notification object which triggers my MII Transaction (after certain condition is getting fulfilled).
Now, I want to pass certain values from PCo to MII using the notification object. For this I have tried 2 options:
1. I defined one input parameter in transaction of type 'XML'. But this did not work. When I used 'Tracer' to check the received values, it showed empty.
2. Since XML variable did not work, I tried with 'String' variable. It worked but the entire input data was in 'String' format.
Actually I used XML_Saver to save the string and given filename as '.xml'. When I opened that xml file, it was looking like this:
<<unable to write XML here>>
Considering the above 2nd option, how can I extract the particular 'Tag' values from XML string. Since the string is not in the format of 'Rowset/Row/Row', I cannot specifically assign/map those tag values to any other variable inside MII transaction.
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Answer 1

Hi, I was trying to post the xml string. It was not possible yesterday (because, SDN editor has converted xml part into some irregular string).
Now, I am trying to post the string by removing the special characters. Please try to understand it.
Now, my question is how to retrieve the CDATA value 5599999999 using xpath. Please help.
NotificationMessage
Body
Values
Expression1 type xsd string
CDATA 5599999999
  /Expression1
  /Values
  /Body
  Faults /
  /NotificationMessage