From DeveloperWorks: Demystifying WebSphere Business Services Fabric End Point Selection:

Learn how the WebSphere Business Services Fabric Dynamic Assembler uses
content, context and contract to dynamically select service endpoints. You’ll learn
how policies are used to select candidate endpoints, and how the Dynamic Assembler
handles policy conflicts and policy resolution.

On the heels of my opening discussion about Fabric and how its a product ahead of it’s time, comes an article from developerWorks that delves into the “how” of the product. This article provides an introduction to the terms that the fabric team likes to toss around: “Policies”, “Assertions”, “Dynamic Assembler” etc.