Query Language

The search engine allows queries to be formed from Boolean expressions containing the keywords AND, OR, and NOT, and grouped with parentheses. For example:

Smith Research
     finds documents containing 'Smith' and 'research'

Smith OR Research
     finds documents containing 'Smith' or 'research'

"Smith Research"
     finds documents containing 'Smith research'

Survey AND Welfare
     finds documents containing both 'survey' and 'welfare'

Welfare NOT California
     finds documents containing 'welfare' but not 'California'

(Welfare NOT Health) AND Mathematica
     finds documents containing 'Mathematica', plus 'welfare'
     but not 'health'

Mathematica*
     finds documents containing words starting with 'Mathematica'

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