Download
boolean searches more than you wanted to know n.
Skip this Video
Loading SlideShow in 5 Seconds..
Boolean Searches: More Than You Wanted to Know PowerPoint Presentation
Download Presentation
Boolean Searches: More Than You Wanted to Know

Boolean Searches: More Than You Wanted to Know

79 Vues Download Presentation
Télécharger la présentation

Boolean Searches: More Than You Wanted to Know

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Boolean Searches: More Than You Wanted to Know Russ Ewick Presents Triple T Searching the Net!

  2. Operators: • Or is or • And = + • Not = -

  3. + and - • Operators like plus and minus are always place in front of the word they operate on. • Example • Trees +evergreens +plants

  4. OR

  5. And

  6. The more terms or concepts we combine in a search with AND logic, the less records we will retrieve.

  7. Not

  8. Helpful Hints • Using the operators • Before you begin • Keywords

  9. Using the Operators • AND and NOT will always narrow your search • OR broadens your search, increasing the number of hits

  10. Before You Begin • Before you begin, think about what words you want to search. • Develop a vocabulary that contains words describing your topic. • If the computer finds nothing using one word, try doing the same search again but substitute a synonymous term.

  11. Keywords • Decide which operators you want to use with which words for your search.

  12. The 3 Manifestations of Boolean Logic 1. Full Boolean logic with the use of logical operators 2. Implied Boolean logic with keyword searches 3. Predetermined language in a user fill-in template

  13. 1. Full Boolean Logic with the use of logical operators • Query: I'm interested in radiation, but not nuclear radiation. • Boolean logic: NOT • Search: radiation NOT nuclear

  14. Another Example • Query: I need information about cats. • Boolean logic: OR • Search: cats OR felines

  15. Here’s Another One • Query: I'm interested in dyslexia in adults. • Boolean logic: AND • Search: dyslexia AND adults

  16. 2. Implied Boolean Logic with Keyword Searches • Query: I'm interested in radiation, but not nuclear radiation. • Boolean logic: NOT • Search: radiation -nuclear

  17. More Implied Logic • Query: I want to learn about cat behavior. • Boolean logic: OR, AND • Search: cats felines +behavior

  18. Another Example • Query: I'm interested in dyslexia in adults. • Boolean logic: AND • Search: +dyslexia +adults

  19. 3. Predetermined Language in a User Fill-In Template • Query: I need information about cats • Boolean logic: OR • Search: Any of these words/Can contain the words/Should contain the words

  20. Another Example • Query: I'm interested in dyslexia in adults. • Boolean logic: AND • Search: All of these words/Must contain the words

  21. One More Example • Query: I'm interested in radiation, but not nuclear radiation. • Boolean logic: NOT • Search: Must not contain the words

  22. a final example • Query: I want to learn about cat behavior. • Boolean logic: OR, AND • Search: Combine options as above if the template allows multiple search statements