Из "Composite Application Guidance for WPF and Silverlight - October 2009\ Upgrading from the Composite UI Application Block":You may be familiar with the Composite UI Application Block, sometimes known as CAB, and the Composite Application Library, sometimes known as Prism. Because the official names are so similar, this topic refers to the Composite UI Application Block as "the Block" and refers to the Composite Application Library as "the Library."Composite Application Library и Prism - почему разные названия, в чем разница? ЗС