Property information
Count of number of months intervening between the start of the stage and the time of birth according to a reference model. Note that the first month of post-birth development has the value of 0 for this property, and the period during which the child is one month old has the value 1.
comment
This is a shortcut annotation that can be expanded to an OWL axiom, or to a set of OWL axioms. The exact translation has yet to be determined, and may be application-dependent.