Question

First of all, thank you for maintaining this project — it has been a great
foundation for our work.

We noticed that Min_Pres_Value (property 69) and Max_Pres_Value (property 65)
are defined as optional in ANSI/ASHRAE 135 for Analog_Input and Analog_Value
objects, and the identifiers already exist in bacenum.h, but ai.c and av.c
currently don't include them in Properties_Optional[] or handle them in
Read_Property.

Would a contribution adding these as read-only optional properties be welcome?
We'd be happy to prepare a PR if this direction is agreeable.