Defining Alphabet Soup

eBPML.org has an informative article up titled Defining Coordination, Composition, Choreography, Collaboration, Orchestration, Transaction...
. It attempts to explain what all these terms mean in the Web Services stack. I found it very useful. When I used to think of web services, I thought of those magnetic poetry sets that have 50 words you can move around on your refrigerator and make them say meaningless yet interesting things. However, after this article I am now fully convinced that there is truly a need for all of them.