PWG Semantic Model v2 Copyright 2002-2011, IEEE Industry Standards and Technology Organization/PWG - MFD Working Group. All rights reserved Editors: Peter Zehler, Ira McDonald Concrete Base Classes for Services Abstract Base Classes for Services Abstract Base Class AbstractBaseClass Abstract Base Class Abstract Base Class Extension Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class Abstract Base Class