Is it possible to disable the derived variable orig?

[jcav]

I am using Daikon to process a set of enters and exits and I was wondering if it would be possible to disable the "orig" derived variable for the exits (e.g., orig(input.value) == input.value) since it generates noisy data. 

I know that it is possible to unset certain derived variables located in the "derive" package, but apparently orig is not present in this package.

Thanks in advance and thank you for the great tool.