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How to use search on the internet - PowerPoint PPT Presentation


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Searching 102. British mathematician largely credited with inventing modern algebra. George Boole, 1815-1865. Boolean Logic. Creating a SET { } that fills certain criteria. Choices of Operators: AND, OR, NOT. “AND’. Both words MUST be present to be valid for the set.

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boolean logic
Boolean Logic
  • Creating a SET { } that fills certain criteria.
  • Choices of Operators: AND, OR, NOT.
slide4
“AND’
  • Both words MUST be present to be valid for the set.
  • Any order, any distance apart will do.
slide6
“OR”
  • Either word will do.
  • Useful for
    • Synonyms
    • Plurals
    • Other forms of a word (adjectives, adverbs, tenses)
slide7
“NOT”
  • Word must NEVER appear in the record.
  • CAUTION! Think before you use this!!!
parentheses
Parentheses
  • Normal order of operation:
    • NOTs
    • ANDs
    • ORs
  • Parentheses forces that part of the operation to be done first
  • Parentheses keep various parts of your search statement together so they can be handled properly.
search strategy
Search Strategy:

bunn? OR rabbit? OR hare OR hares

new strategy
New Strategy:

(bunn? OR rabbit? OR hare OR hares)

AND

(pet OR pets OR “companion animal?”)

new search strategy
New Search Strategy:
  • ((bunn? OR rabbit? OR hare OR hares) AND (pet OR pets? OR “companion animal?”)) NOT (laborator? OR hunt?)
stop words
“Stop Words”
  • Articles
    • A, An, The
  • Prepositions
    • Of, In, By, For, From, To ….
next step fields
Next Step: Fields
  • Library catalog and other databases put certain information in Fields.
    • Author:
    • Title:
    • Date:
    • Subject Headings:
  • You can use the fields to tighten up your search.
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