Pset_PrecastConcreteElementGeneral what camber does CamberAtMidspan refer to?

Pset_PrecastConcreteElementGeneral has a property named CamberAtMidspan defined as

> The camber deflection, measured from the midpoint of a cambered face of a piece to the midpoint of the chord joining the ends of the same face, as shown in the figure below, divided by the original (nominal) straight length of the face of the piece.

The definition is not specific regarding when the camber is measured or the source of the camber.
Is this the natural camber due to eccentric pretensioning? If so, when is it measured? At release? at the end of storage/time of transport? long term after creep, shrinkage, and other time-dependent effects have occurred?

Is this a camber intentionally built into the concrete formwork prior to placement of concrete into the models, as described in "[Fabrication and design of precambered precast, prestressed concrete bridge girders](https://doi.org/10.15554/pcij65.3-02)"?

Start with the CamberAtMidspan definition in Pset_PrecastConcreteElementGeneral and review the cited paper on precambered precast, prestressed concrete bridge girders. Compare the possible measurement times and sources raised in the issue, then update the specification so the property’s intended camber and measurement point are unambiguous.

Written by the indexing model from the issue text.