I've noticed that reference and instructional librarians (at least in published literature) tend to use the term "federated search" more often than others. And by that they mean a broadcast search, not what Ray and many others mean by that term.
Library technology folk tend to use the other terms more often.
Library Web Services Manager
California State University
From: Code for Libraries [[log in to unmask]] On Behalf Of Ray Denenberg, Library of Congress [[log in to unmask]]
Sent: Tuesday, April 21, 2009 8:28 AM
To: [log in to unmask]
Subject: Re: [CODE4LIB] Serials Solutions Summon
From: "Thomas Dowling" <[log in to unmask]>
> You can define differences between meta-, federated, and broadcast search,
> every discussion on the topic will be punctuated by people asking, "Wait,
> what's the difference again?"
Leaving aside metasearch and broadcast search (terms invented more recently)
it is a shame if "federated" has really lost its distinction
from"distributed". Historically, a federated database is one that
integrates multiple (autonomous) databases so it is in effect a virtual
distributed database, though a single database. I don't think that's a
hard concept and I don't think it is a trivial distinction.