Chapter 24 - SpecialService is used to apply authentication and authorization policies to; it contains code to retrieve the user identifier from the WS Security header
Chapter 21 - Working with MDS (design time and run time) and a common SB project for shared resources (design time and run time)
Chapter 21 - Working with MDS (design time and run time) and a common SB project for shared resources (design time and run time); application SBConversionService has local, read only copy of CommonProject and references artifacts in ConversionService project