Federated Search Vs. Metasearch Engines

A federated search engine enables the user to search through multiple databases put together by the content provider (eg: Ebsco, Proquest or Google Scholar). All information that will be searched is integrated into one repository. Federated search is complex software. All sources added to it should be available at all times and of course users expect it to be fast like Google. Any rotten link is a disappointment for the users.

In a federated search, (like Google Scholar) someone has already put together databases from which you can get a response in unified format. Does this person who puts these databases together know for sure that these are the only databases (or sources) to be searched on this subject? May be the user wants to search across many disciplines to find an answer to his/her query. In this case, the federated search is restrictive. Many have called it a dumbing down search – making it too easy for the user. But still, users would have to be creative with search terms, know their subject headings, know their databases and to a large extent have some computer literacy skills. Database vendors offer federated search that allows users to search across all their databases (subscribed ones).

WorldCat is another example of federated search. A federated search is a way to harness the larger WWW. Google Co-op is also an example of how anyone can create their own limited search with pre-prescribed search engines or websites.

With Metasearch Engine users can submit a question to many information resources simultaneously – not just the chosen ones. Information is not integrated and is processed only when the user types a query. It is also known as cross searching (of databases), integrated searching, multiple database searching, parallel searching, etc. As it contains numerous sources to search from, a broken link will not be too much of a disappointment to the user.

Also, in metasearch search, content is fresh. Sources are added and searched everyday. In a federated search, the content provider has to find sources to add so information may be delayed.