Types of Web search tools:
What are directories?
- Human-selected websites organized into categories (classification)
- Consider these characteristics: size, categories, annotations, searchability, authority (origin), features)
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What are search engines?
- Large database of websites; results include your keyword(s); ranked by the search to
– How do they work? p. 62
- crawler finds webpages on the open web,
- web pages are indexed (http://www.google.com/librariancenter/articles/0512_01.html)
- results of a searh are ranked for the results list:
- Ranking: example: Google page ranking http://www.google.com/corporate/tech.html
spoof: http://www.google.com/technology/pigeonrank.html
- Display of results - can include advertisements,sponsored links, related searches, other links
Metasearch: searches other search tools together.
(example Dogpile.com – show comparison – it searches google. Yahoo, bing – not same results
Portal: a gateway to web resources; can include search, directory and additional links (e.g. MyYahoo; iGoogle)
Search strategies: Basic list of strategies: pages 13-14
– BRAINSTORMING Keywords:
- use quotation marks for phrases;
- add more words to narrow;
- use synonyms to broaden or find more
– Advanced search options:
consider which might be useful for a particular type of search or type of information needed.
- What are filters?
- Types of filters (by: title, domain type, inURL, file type, date)
– Boolean operators p 67-8
- AND, OR, NOT
implied Boolean (as a phrase, all of these, any of these, none of these)
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