1. The ”level” property type
<component being measured> “level”
E.g. for the component ”enzyme” the property type for an instance might be “mass concentration” or an “enzymic activity level”
”level” = ”concentration” or ”activity”?
”level” = ”concentration” and ”activity”?
”level” = ”(at least and at least some) ordinal scale observable”?
Ordinal = interpretation of quantity?
”level” local synonym to ”concentration”, ”activity”
Should not be represented in the international release

2. C-NPU example
NPU02542 Pt—Lactose tolerance; k-o-p(list; lactose p.o.; proc.) …
NPU08516 B—Glucose; subst.c.(15 min) = ? mmol/l
NPU08504 B—Glucose; subst.c.(30 min) = ? mmol/l
NPU08502 B—Glucose; subst.c.incr.(max. c. minus 0 min c.; proc.) = ? mmol/l
NPU10463 B—Lactose; subst.c.(0 min) = ? mmol/l
NPU18845 B—Lactose; subst.c.(15 min) = ? mmol/l