At present, the definition for Observation.component only allows for true components (e.g. systolic & diastolic for blood pressure or color & cry for apgar). It doesn't make clear that components can also qualify (e.g. cuff size or sitting/standing/lying for blood pressure). Such qualifying information can't be sent as a separate observation because it cannot be interpreted on its own and its occurrence and status is intrinsicly tied to the base observation. The definition needs to make this clear. As well, there needs to be text added that the presence or value of components cannot change the interpretation of an Observation unless the Observation.code explicitly identifies those components. I.e. the understanding gleaned by looking only at Observation.code & value and ignoring components must still be valid unless the Observation.code identifies explicit components that must also be taken into account.