HI Nathan,
You are referring to the 9.1 users guide and I assume you are on 10.0.x? In a more recent version post processing of data sets was changed. Please check here for a list of commands:
http://confluence.dbvis.com/display/UG100/XML+element+-+Commands#XMLelement-Commands-ProcessDataSet
Regards
Roger
Nathan Aaron
http://confluence.dbvis.com/display/UG91/XML+element+-+Commands#XMLelement-Commands-XMLelement-Output
Drop does not work. Have these features been implemented yet?