1 TRACE
2? 
2 number
2.0? 
2.0.0+ 
2.0.0 ?
2.0.0 !
2.1! Normal
2.1?
2.1 All
2.1 Commands
2.1 Error
2.1 Failure
2.1 Intermediates
2.1 Labels
2.1 Off
2.1 Results
2.1 Scan
3 ;