A definition of a thing that happens. That is a completion and / or commencement of a change, or the outcome of a change, or the arrival of a pre-determined point in time. Specifically, not a thing that takes place.<br/><br/>#EndOfDef#<br/>Specification works similar to Type: it distinguishes event instances in classes (type) of event, it defines behavior of such a class, and the specification is owned/issued by a party<br/><br/>Pretty much the same as a BDT with con an enumeration and sup about ownership and version control<br/><br/>