Boolean Operators
- AND - both terms (Jonas Salk AND Polio will find both in one article)
- OR - either term or both term. (history OR causes will get history, causes, OR both history and causes)
- NOT - Do not include a term. (Jonas Salk AND Polio NOT influenza will get you Jonas Salk, Polio, but NOT influenza)
Example of Boolean searching
Jonas Salk
Jonas Salk AND Polio
history OR causes
Jonas Salk AND Polio
history OR causes
AND transmission
NOT influenza
polio
history OR causes
AND transmission
polio
transmission OR causes
AND history
polio
transmission AND causes
What did we discover?
- When get way too many results so we incorporate Boolean searching.
Jonas Salk AND Polio
history OR causes
Jonas Salk AND Polio
history OR causes
AND transmission
NOT influenza
polio
history OR causes
AND transmission
polio
transmission OR causes
AND history
polio
transmission AND causes
What did we discover?
- When we seach just Polio and not Jonas Salk we get modern day information.