Property information
Count of number of years intervening between the end of the stage and the time of birth according to a reference model. Note that the first year of post-birth development has the value of 1 for this property, and the period during which the child is one year old has the value 2
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.