additionalVariable on ExercisePlan in pending review

I have no idea where you guys are tracking pending review for
health-lifesci ... so...here's my quick comment from something I spotted
this evening.

I think that the property
https://health-lifesci.schema.org/additionalVariable such as on
ExercisePlan could expect a type of PropertyValue in addition to Text ?
 because its description leads me to suspect that a few Types might help
there as well:

`additionalVariable - Any additional component of the exercise prescription
that may need to be articulated to the patient. This may include the order
of exercises, the number of repetitions of movement, quantitative distance,
progressions over time, etc.`

Basically treating additionalVariable similarly to how additionalProperty
is on QualitativeValue.  They seem almost to be twin properties in usage, I
think.

Thad
+ThadGuidry <https://www.google.com/+ThadGuidry>