Try this:
| stats count | eval xml = "<request><CustomerName>Smith</CustomerName><CustomerAddress>111 Elm Street</CustomerAddress><CustomerCity>Allentown</CustomerCity></request>,<request><CustomerName>Smith</CustomerName><CustomerAddress>111 Elm Street</CustomerAddress><CustomerCity>Allentown</CustomerCity></request>,<request><CustomerName>Smith</CustomerName><CustomerAddress>111 Elm Street</CustomerAddress><CustomerCity>Not Allentown</CustomerCity></request>" | makemv xml delim="," | mvexpand xml | rename xml as _raw
| spath | dedup request.CustomerCity | table request.CustomerCity
The first block just sets up dummy data, the meat is the last three commands. spath grabs the fields from your XML, dedup does the sort|uniq part, table picks out just that column to show.
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