Boolean Search in Bioinformatics

1. Swati Kumari
M. Sc. Bioinformatics
1st semester
Roll no. - 22
BOOLEAN SEARCH IN BIOINFORMATICS

2. CONTENT
 What is boolean search
 Basic boolean search operators
 Some rule for boolean search
 Boolean operator : AND
 Example using AND
 Boolean operator : OR
 Example using OR
 Boolean operator : NOT
 Example using NOT

3. Basic Boolean Search Operators
AND (&) makes search more specific.
OR (!) brodens the search.
NOT (-) excludes unrelated terms.

4. Some Rules for Boolean Search
Boolean operator must have written in capital latter.
Any boolean operator must have a term or keyword both before and
after.
If any one of them (term or keyword) is missing it will show error.
The terms entered will be matched exactly because our result is based
on our quiries whatever we entered.

5. Example using AND
Insulin AND human
•It would return where the search fields
contain both these term or keyword.
•The shaded area represents search result.
•In mathematical term we can say that “insulin
intersection human” are selected.

6. Boolean Operator : OR
•The boolean search operator OR is the default setting of any search
engine.
•It return the records that contain either of the search term or keyword
that we specify.
•The more terms we connected with OR, the more search result we will
be find.

7. Example using OR
Insulin OR human
•It would return records where the
search fields contain either or both of
the them.
•The Shaded area represents search
result.
•In mathematical term we can say
that “insulin union human” are
selected.

8. Boolean Operator : NOT
•The boolean search operator NOT is equal to the “-” symbol.
•It return records that do not contain a search term in the search.
•Use NOT to exclude a term from search and fewer result will be find

9. Example Using NOT
lnsulin NOT human
•It would return where the search
field containing only information on
term, and nothing on keyword.
•The shaded area represents search
result.
•In mathematical term we can say that
“insulin intersection human
compliment” are selected.

10. REFERENCES
lhttp://www.webopedia.com/TERM/B/Boolean_operator.html
lClass lecture

11. THANK YOU