Hi Jochen,
Did you try to map the meta data to K2 datafields, instead of XMLfield?
The draw back is that you have to create one field at a time.
I had more success rate using data-field. (however, sometimes one or 2 fields value are missing).
=====
There is another proposition for you and I'm not sure it is feasible to your solution.
Create a column or meta data in your list, then trigger the workflow using an UPDATE event instead of DELETE.
Then after you read all the Meta Data to K2, ask K2 to delete the item using the SharePoint Item wizard.
Hope this helps,
Regards,
The statements and opinions made in my postings are my own, and do not reflect the opinions of SourceCode Technology Holdings, Inc. or its subsidiaries. All information is provided as is with no warranties, express or implied, and grants no rights or licenses.