Internet Guide: Yahoo!
Databases: The Yahoo directory, a subset of the Google database, Research Documents (a fee-based service of approximately 7000 full-text sources, including journal articles), News, and more.
Size: The Yahoo directory includes approximately 2 million web pages.
Search Tips: Yahoo provides results in five categories. Categories include all the Yahoo category headings that match the search terms; Web Sites include all the sites in the Yahoo directory that include the search terms in the titles and descriptions; Web pags are sites from the subset version of Google. Note that when in Advanced search, the search options you choose apply only in the Yahoo directory, i.e. they are not forwarded to the Google subset database. Also, Yahoo's search syntax is not always compatible with Google's search syntax. If you need more results than those obtained under Categories and Web Sites, it is recommended that you go directly to another search site and run your search there.
All search terms are automatically stemmed. You can turn off the automatic stemming by enclosing the search term or terms in quotes. This means that all phrase search has the automatic stemming deactivated.
| Yahoo! | |
| Boolean | Not available. In the Main search mode, when multiple terms are entered Yahoo defaults to the and operator, retrieving sites that include all your search terms. In Advanced, choose "matches on all words" for and and choose "matches on any word" for or. |
| +Requires | Use the "+" sign before a search term to include that term in the search results; e.g.+ bordeaux +tourism. |
| -Excludes | Use the "-" sign before a search term to exclude that search term from the results; e.g. "book review" -nonfiction |
| Truncation | Search terms are automatically stemmed, e.g. touris retrieves tourism, tourist, tourists, recipe retrieves recipe, recipes. To turn off the automatic stemming, enclose the search term or terms in quotes. |
| Phrase Searching | Enclose the words to be searched as a phrase in quotes, e.g., "acid rain". In Advanced, choose "an exact phrase match." |
| Limiting to Specific Fields | t:term retrieves sites with the term in the title u:term retrieves sites with the term in the url. |
More Directories Guides
| Internet Public Library
| Open Directory
| Virtual Reference Library
January 20, 2010
