UMLR — Incorrect use of multiplicity element.

The standard defines lowerBound() and upperBound() as returning 1 when the value is unspecified.

However, many attributes in the XMI (for example Activity::edge - the very first attribute in the XMI) are specified as if the default lowerBound() is 0. No attributes (AFAICT) set the default value to "1".

I am trying to generate code from the XMI but this becomes a blocking issue - there is no possible default behaviour.