Use the prefix device: with an UltraLite option to indicate that the option only applies when the application is running on the mobile device.
device:option=value
If the option is appropriate for both desktop and mobile device, then do not use the prefix.
Use the device option prefix for UltraLite client applications that run on a variety of devices.
Options with a desktop or device prefix take precedence over options without a prefix.
The following example identifies different database files for the desktop and the mobile device, the location of the temporary directory on the mobile device, and the cache_size for the mobile device:
"desktop:DBF=C:\dir\db.udb;device:DBF=\SD Card\db.udb;device:temp_dir=\Temp;device:cache_size=4M"