Enterprise Administration > Windchill Export and Import > PTC Windchill PLM Connector - Creo Packages Administrator's and User's Guide > Windchill PLM Connector – Creo Packages > Exporting Packages > Preparing a Package for Export > Setting Export Preferences > Using Prefixes
  
Using Prefixes
The prefixes used in the wpc_preferences.txt file are the following:
• %o—Indicates the operation being performed. Values can be export or import.
• %u—Indicates the username for Creo Packages.
• %t—(Optional) Enables the timestamp for an exported package.