Selective update in bulk action

I find this finding on IdM 6.0sp1, and haven't tested it yet in other IdM version.
Consider this, you want to do bulk action to update bunch of user, but not all the user you want to update share the same attributes. Rather then making separate bulk action to update the attribute, you can 'ignore' update to the attribute by providing an empty value (,,), not empty string(,"",) on your script.

Take this example:
-user01: firstname="locco", lastname="creamer", email="locco.creamer@example.com"
-user02: firstname="nartha", lastname="rover", email="nartha.rover@example.com"

Then we run the followin bulk action script:
"command","user","global.firstname","global.lastname","global.email"
"update","user01","rocco","","rocco.mate@example.com"
"update","user02","martha",,"martha.rover@example.com"

This is the result:
-user01: firstname="rocco", lastname="", email="rocco.mate@example.com"
-user02: firstname="martha", lastname="rover", email="martha.rover@example.com"

Remember, always test your script on your development environment first to avoid any unwanted case.