boolean searching

boolean searching

A method of combining concepts in a search which allows the searcher to narrow or broaden the focus of a search; boolean logic uses 3 logical commands or "operators": AND, OR and NOT.

Boolean search commands
OR
Used to expand or broaden search results to include synonyms and related terms.
 
Example
“Violence or conflict or aggression”; this search string would retrieve any record that held any of those 3 words.

AND
Used to narrow or restrict search results.
 
Example
“Violence and conflict and aggression”; the search string would retrieve any record that contained all of those 3 words; however, the search would not retrieve any record that had only 2 of the 3 terms.

NOT
Used to further restrict search results.

Example
“Television and broadcasting not video”; here the search string would retrieve records that had both the terms "television" and "broadcasting" but would eliminate those records if they also contained the word "video".

The addition of parentheses enables the searcher to specify which segment of the search string is to be evaluated first.
 
Example
“Television and (violence or aggression)”; here, the search engine will look first for items that contain either of the terms "violence" or "aggression"; it will then narrow down those search results even further to contain only the records that have the word television as well as either of the other 2 terms.
References in periodicals archive ?
Inference's offering includes secure ASP hosting that allows web-based access to data and analysis anywhere at anytime, traditional Boolean searching, and Bayesian mathematical algorithms to connect concepts based on actual definition and usage.
Additionally, improved efficiency with multi-threading, Boolean searching and smart collection technology speed performance and work flow.
Boolean searching is available with eight different fields and several ways to broaden or narrow the search.
A reference librarian from Montana State University embraces the complexity of teaching web search skills and explains the advanced search features offered by phrase searching, limits, Boolean searching, and truncation.
Some go beyond traditional Boolean searching to include enhancements like a built-in thesaurus, natural language and fuzzy searching.
Boolean searching uses three words to determine results: and, or and not.
Boolean searching also allows searches for phrases and individual terms concurrently.
Boolean searching is also a feature, which for instance, could combine any subject with any place with any year or years.
E-binder features phrase and Boolean searching, side-by-side viewing of two transcripts, a keyword concordance of related trial transcripts, and the ability to save transcripts as HTML to post on the Internet, an intranet or extranet.
To be sure, Information Finder would employ Boolean searching.
There is also a selection of new search short cuts, including a 'Show all Content' option; 'Wildcard' searching, where a user can insert '*' as a substitute for any characters in a search string; 'Snippeting', to provide summary content on research and press releases; and boolean searching, where users can insert the words AND, OR and NOT to speed up the search enquiry.
For a national library, the search capabilities of the online catalog are not as sophisticated as American users are accustomed to, although Boolean searching and limits by format are available.