For SVRF and TVF (Tcl Verification Format) commands, the place to go is the SVRF manual (svrf_ur.pdf). Your local installation will be in synch with whichever version of Calibre you are using.
If you are on the latest (2012.4), here's the page you need:
Looks like "DEVICE" is syntax 7. (I'm assuming the "xIGNORE" is a typo for "IGNORE".)
xIGNORE is generated internally by xCalibrate.
yes, thanks Karen. I already got to know from other MG engineers. In most cases, I should not worry aboout this command.