Tim Berners-Lee 239
External links
- Tim Berners-Lee (https:/ / twitter. com/ timberners_lee) on Twitter
- timbl (http:/ / identi. ca/ timbl) on identi.ca
- Tim Berners-Lee (http:/ / http://www. ted. com/ speakers/ tim_berners_lee. html/ ) at TED Conferences
- Tim Berners-Lee (http:/ / http://www. imdb. com/ name/ nm3805083/ ) at the Internet Movie Database
- Tim Berners-Lee (http:/ / http://www. nndb. com/ people/ 573/ 000023504) at the Notable Names Database
- Works by or about Tim Berners-Lee (http:/ / worldcat. org/ identities/ lccn-no99-10609) in libraries (WorldCat
catalog) - Tim Berners-Lee (http:/ / http://www. w3. org/ People/ Berners-Lee/ ) on the W3C site
- First World Wide Web page (http:/ / http://www. w3. org/ History/ 19921103-hypertext/ hypertext/ WWW/ TheProject.
html)
Web search query
A web search query is a query that a user enters into web search engine to satisfy his or her information needs. Web
search queries are distinctive in that they are unstructured and often ambiguous; they vary greatly from standard
query languages which are governed by strict syntax rules.Types
There are four broad categories that cover most web search queries[1]:
- Informational queries – Queries that cover a broad topic (e.g., colorado or trucks) for which there may be
thousands of relevant results. - Navigational queries – Queries that seek a single website or web page of a single entity (e.g., youtube or delta
air lines). - Transactional queries – Queries that reflect the intent of the user to perform a particular action, like purchasing
a car or downloading a screen saver.
Search engines often support a fourth type of query that is used far less frequently: - Connectivity queries – Queries that report on the connectivity of the indexed web graph (e.g., Which links point
to this URL?, and How many pages are indexed from this domain name?).
Characteristics
Most commercial web search engines do not disclose their search logs, so information about what users are
searching for on the Web is difficult to come by.[2] Nevertheless, a study in 2001[3] analyzed the queries from the
Excite search engine showed some interesting characteristics of web search:- • The average length of a search query was 2.4 terms.
- • About half of the users entered a single query while a little less than a third of users entered three or more unique
queries. - • Close to half of the users examined only the first one or two pages of results (10 results per page).
- Less than 5% of users used advanced search features (e.g., boolean operators like AND, OR, and NOT).
- The top four most frequently used terms were , (empty search), and, of, and sex.
A study of the same Excite query logs revealed that 19% of the queries contained a geographic term (e.g., place
names, zip codes, geographic features, etc.).[4]