Collections without services are useless, and services without collections are empty. A library needs both collections and services in order to practice librarianship.
Eric Lease Morgan (on the NGC4LIB-list, 20.03.2007)
(...) the traditional monolithic library system has had its day. The systems of the future will be assembled from many components, probably from several sources both Open and Commercial, some hosted locally and some from services provided as web services from within the Internet cloud.
Richard Waller (entry at Panlibus)