Mx SECTion through triangulation leaving field 1 blank (draping)

Dear colleagues, 

Starting on a new project, I found my predecessor used draping on triangulation input leaving the field 1`blank, like this: 

SECTion ,tri kwm inm,kwm
SECTion ,kwm
177,    ,tkwm,    , 
999

thus draping all strings in the kwm model.

I didn't even know that was an option (it isn't in the reference information, fields 1 and 3 are * mandatory. Never too old to learn, and experiment, I tried to use this with a partial string name to exclude other alignment's designs: 

SECTion ,tri kwm inm,kwm
SECTion ,kwm
   Uitsluitend de PRB Z; de andere assen volgen een nieuwe en afwijkende druklaag
177,  h ,tkwm,    , 
999

but no luck this time. All strings are draped, the partial label is ignored. I'll work around this, but is this intended?