Technique | What it Does | Example |
---|---|---|
Truncation — adding a symbol to the root of the word to retrieve related terms and variant endings for the root term. Some databases have left- and right-hand truncation. | Expands your search | structur* finds structure, structuring, structures, etc. *elasticity will find elasticity, aeroelasticity, viscoelasticity |
Boolean AND — retrieves only those records containing all your search terms | Narrows your search | finite AND element AND methods |
Boolean OR — retrieves records containing any of your search terms; especially useful for synonyms, alternate spellings, or related concepts | Broadens your search | energy OR fuel pollut* OR contaminat* sulfur OR sulphur |
Boolean NOT, AND NOT — attempts to exclude a term that is not useful or relevant | Narrows your search | "Advanced Materials" AND composite NOT wood |
Proximity — retrieves terms within a specified distance of one another; variations of proximity searches are phrase searches, where the terms must be retrieved exactly as entered; NEAR, ADJACENT, WITH, and WITHIN searches. To use the proximity search, enclose your search terms in quotes and use the tilde (~) followed by a number. The number indicates the maximum number of words you wish to allow between your search terms. |
Narrows your search |
"Styrenic Block Copolymers" (quotation marks ensure that the multiple-word term is searched as a phrase, but are not required for all databases). "employee engagement"~5 finds material where "employee" and "engagement" appear within 5 words of each other. NOTE: proximity searching does not take the order of search terms into account. A search on "employee engagement strategies"~5 will yield results in which the three search terms appear in various orders. |
Parentheses ( ) — groups terms with Boolean for more complex searches | Combines searches | "mechanical engineering" AND (handbook OR dictionary) |