Basic rules of Chinese Romanization used in North America library system:
A keyword search looks for words anywhere in the record (title, author, subject, abstract, etc). Keyword searches are a good substitute for a subject search when you do not know the standard subject heading. Keyword may also be used as a substitute for a title or author search when you have incomplete title or author information.
However, Keyword searches often yield too many or too few results, or too many irrelevant results.
To create a precise search strategy
AND |
Narrow your search |
Apples AND Oranges |
OR |
Expand your search |
Apples OR Oranges |
NOT |
Remove results |
Fruit NOT Apples |
" ... " |
Search a phrase |
"Political Science" |
* |
Truncate a word |
Politic* - Politic, Politics, Political, Politician, Politicians |
In library catalogs and databases, items are assigned subject headings (or descriptors) to describe the content of the item. Using subject search ensures that all items about the same topic can all be accessed with one search term. Search results are usally very relevant to the topic.
However, subject headings are a set of pre-defined terms or phrases, known as controlled vocabulary. You must know the exact controlled vocabulary term or phrase.
Find the subject heading: