+/**
+ *
+ * @author bsinou
+ *
+ * This class implements the archetype of a given process.
+ *
+ * WARNING : for now both <code>values</code> and
+ * <code>executionSpec</code> which are rundundant are used. Should be
+ * improved in further version. Note also that a third redundant field,
+ * <code>RealizedFlow.executionSpec</code> is also to be cleaned.
+ *
+ */