| Concept | Description | Westlaw | Lexis | Use |
|---|---|---|---|---|
|
and |
both terms must be present | and & |
and & |
trademark AND infringement |
| or | either term must be present | space or |
or | car OR automobile in all three systems |
| and not | exclude a term | % but not |
and not % but not |
collateral AND NOT estoppel; collateral % estoppel |
| same sentence | terms must be in same sentence | /s | /s | cat /s dog |
| same paragraph | terms must be in same paragraph | /p | /p | cat /p dog |
|
within "n" |
terms must be within specified number of words n=number |
/n | /n | cat /5 dog |
|
pre/n |
terms must be within specified number of words and in the order specified | +n | pre/n | john pre/3 roberts;john +3 roberts |
| phrase | exact phrase | " " | " " | "sheep dog" |
| root expander | expand the root word by any number of letters | ! | !, * | shep! = shepherd, shepherding, etc. |
| universal character | variation for a single character | * | ? | wom*n would find woman or women |
| processing order | grouping search terms | ( ) | ( ) | (car OR automobile) |
| at least | there must be at least "n" appearances of a term or phrase | ATLEASTn | ATLEASTn | atleast6(termination) |
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