| Term | Definition |
|---|
| • Specific question | question you can phrase easily and one for which you will recognize the answer when you find it |
| • Exploratory question | open-ended question that can be harder to phrase; it also is difficult to determine when you find a good answer |
| • Search engine | Web site (or part of a Web site) that finds other Web pages that match a word or phrase you enter |
| • Search expression or query | word or phrase you enter in a search engine |
| • Hit | a Web page indexed in the search engine's database that contains text that matches your search expression |
| • Results pages | a list of Web pages in a search engine that contain hyperlinks to the Web pages that contain text that matches your search expression |
| • Web robot (bot or spider) | a program that automatically searches the Web to find new Web sites and update information about old Web sites already in the database |
| • Sponsored links | paid placement links on results pages |
| • Banner ad | sponsored link that appears in a box on the page (usually at the top, but sometimes along the side or bottom of the page) |
| • Meta tag | HTML code that a Web page creator places in the page header for the specific purpose of informing Web robots about the content of the page |
| • Full text indexing | when search engines store the entire content of every Web page they index |
| • Stop words | common words, such as and, the, it, and by, that many search engines omit from their databases |
| • Page ranking | a way of grading Web pages by the number of other Web pages that link to them |
| • Stemming | the use of the root form of a word to find results containing the root word and its variations, which are created by adding standard endings to the root word (Canada -> Canadian) |
| • Natural language query interface | allows users to enter a question exactly as they would ask a person that question |
| • Parsing | the procedure of converting a natural language question into a search expression |
| • Web directory | a listing of hyperlinks to Web pages that is organized into hierarchical categories |
| • Hybrid search engine directory | the combination of search engine and directory |
| • Mamma.com | was one of the first metasearch engines on the Web http://mamma.com/ |
| • Web bibliographies | Web search tools that are similar to bibliographies in that they contain lists of hyperlinks to Web pages, but instead contain list of links to Web pages |
| • Boolean algebra | was developed by George Boole, a nineteenth century British mathematician |
| • Boolean operators, | or logical operators, specify the logical relationship between the elements they join |
| • A precedence operator, also called an inclusion operator or a grouping operator | clarifies the grouping within a complex expression and is usually indicated by the parentheses symbols |
| • A location operator, or proximity operator | lets you search for terms that appear close to each other in the text of a Web page. The most common location operator offered in Web search engines is the NEAR operator |
| • Clusty | is a search engine that uses advanced technology to group its results into clusters |
| • Static Web page | an HTML file that exists on a Web server |
| • Dynamic Web page | a Web page generated as a result of a user's query |
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