The endless struggle for perfect teminology (preface to the second edition, page xvii):
"A service is an instance-level concept - where such instances can be component instances. These instances are `live` and thus require grounding in concrete hardware, software and organizational infrastructure."
"I used the term `web service` when referring to a service that is concretely provided"
"XML web services - a subset of web services that relies on XML as the fundamental representation format"