Ecommerse
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Chapter 1: E-Commerce
Internet Searching Tactics
Course Online Site:
Internet Searching
Why bother?
Finding resources for class (to make supplementary handout materials, to present additional info online)
Finding answers to questions
Search Engine Types and functions
Search engines vary in size, scope, format, state of currency, breadth of searching, how results are displayed, whether or not they use ranking, and whether or not the search is conducted on one database or multiple.
Subject Directory Services, AKA Categories or Subject Guides:
Think tree structure!
Definition: Human arrangement of topical content, linked to a database of web page images; user clicks their way down a chain of topics and sub-topics.
Examples: Yahoo.com, AltaVista.com, About.com, Academicinfo.net, Infomine.com
Computers and Internet > Internet > World Wide Web > Searching the Web > Search Engines and Directories
Look at the
Online Directories and Resources – Examples:
(See Course Online Companion — Subject Guides, White Pages, Yellow Pages, Online References)
www.webopedia.com – The only online dictionary and search engine you need for computer and Internet technology
www.lii.org – Librarian’s Index to the Internet
Text-Based Searches:
Example: Yahoo’s text search textbox and access to advanced search options
Definition: text or keywords, typed in by user are matched against the contents of a database, resulting in a list of URLs of web pages; not organized by a human, but gathered usually by spiders/bots.
Objective: to return as small an answer set as possible (less than 20)
Variant: meta-search engines – use multiple search databases to return an answer set. Examples Metacrawler.com,
Basic mode options:
“quoted text” — treated as phrases; words contiguous; case observed in some engines
wildcard characters – *, % (dependent on search engine software) — “keyword morphing”
+(and) – placed before the search word; means the word MUST be on page
-(not) – means that the page is not to be in the answer set if the word is on the page
title: / t: / allintitle: – means that the word can be found in the title of the web page
url: / u: / allinurl: – means that the word can be found in the url of the web page
text: – means that the word will be found in the body of the page’s text
Class Exercise: use Yahoo.com first, then Google.com
Yahoo Criteria
Result
Google Criteria
Result
+search +engine
+search +engine
T: search engine
Allintitle: search engine
T: “search engine”
Allintitle: “search engine”
U: “search engine”
Allinurl: “search engine”
U: “search engine” -submit
Allinurl: “search engine”
—submit
In advanced mode:
U: “search engine” —submit
Select Language = English
“search engine”
WITHOUT submit
Language = English
“search word density”
“search word density”
Boolean Logic Searches
Just as in algebra, the Boolean operators can be used with parentheses to construct a query phrase that includes and excludes exactly what you want.
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The object of a search is to construct a very well defined query
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Booleans are not available with all search engines
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Basic Boolean operators: And, Not, Or, (see Venn diagrams),
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Examples of non-standard operators: Near,