HON: MedHunt Search HELP - Boolean operators

Health On the Net Foundation's Medical Document Finder	Medhunt Help - Boolean operators

MedHunt allows Bolean searches, whereby add the words and, or in your searches or adjoin its, as in Breast and Cancer, Breast or Cancer, and "Breast Cancer". These powerful commands create a relationships between words of your query and help to refine it.: - The use of Boolean operators is significant only with more than one word in your search.; - To use these Boolean commands you have to check the corresponding box.; - No check of Boolean operators box will imply the use of the default selection: and

Example with the query breast cancer:

And	Default selection Add and in your searches as in breast and cancer Return only sites with all words you type in the form. The result will include all the pages containing the both words breast and cancer.
Or	Add or in your searches as in breast or cancer Return sites with each words of your request. The result will include all the pages with the word breast and all the pages with the word cancer.
Adj	Adjoin your searches as in "breast cancer" search for all your words as nearby words. the result will include all the sites with breast cancer as it is.

Results - Hit list: A search with or will yield a list of sites much longer than with and which will give at its turn a list of sites much longer than with the use of the adjacent operator.

Relevancy of the query: The choice to adjoin the words as in "Breast Cancer", that is to use the adjacent operator, is much more appropriate than to use and or or. Because you are not interested for information about cancer only or breast only but you want to find paragraphs dealing with breast cancer.

http://www.hon.ch/MedHunt/Help/Boolean.html

Last modified: Tue Nov 24 1998