Position Callout & Constraint

[[Ke...]]

Reporting: Position of diameter (blue), to Datums A & H (Datum A is the centerline of the part; Datum H is the purple diameter.
Due to function, we want the location to be reported from Datum H only (in Y & Z) , and A is used to spatially align the part.
In order to do this, I used Datum H as the Primary Datum, and Constrained the alignment to Datum A.

Question: Is there a more effective way to communicate this on the print? Like... Calling out Position to H, and adding a note to constrain to A? Or is it up to the programmer to intuit the correct method? ... or am I breaking the law? 🤣

[[Da...]]

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The centerline of a part can't be a datum. One or more features of size along the centerline of the part can be a datum or a shared datum.

And why not use A as the primary? A small diameter on a big part as a primary datum seems strange.

[[Ke...]]

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Poor wording on my part: Datum A is the Cylinder (but the alignment origin shows at the CL of A)

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Datum H is where a component gets fastened. The feature of interest is a location dimple. The relationship of these two features (in Y&Z) is what is important... If I fill in Datum A as the Primary & Datum H as the secondary, then the the Position origin is taken from A (in Z), instead of from Datum H, as intended (see image). The only way to report (as far as I am aware) both the Y&Z to Datum H is to fill in H as the Primary, and constrain to A (effectively overriding H as the Spatial (my assumption)