  This document defines an operational semantics for activity diagrams (ADs)
using a translation to SMV. The translation is inspired by the work of Eshuis
[Esh06] and extends it with support for data. Each execution step of the SMV
module obtained from an AD represents an executed action of this AD with
interleaved execution of concurrent branches. An implementation of the given
translation was used in the context of semantic differencing for ADs [MRR11].
We define the translation and give two examples, showing ADs and their complete
representation in SMV.
