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High Points CSCI 1710 Spring 2016
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The Internet Packet switching Arpanet Cold War
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The Web Part of the Internet Tim Berners-Lee HTML URI HTTP
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The Web Protocols HTTP / HTTPS FTP Internet Protocol (IP) tcp/ip
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The Web DNS Uniform Resource Locator (URL) Domain names
Top Level Domains Uniform Resource Locator (URL)
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The Web Hypertext Server Client HTML - Hypertext Markup Language
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Hypertext Markup Language (HTML)
“Language of the Web” Plain text Markup Syntax -- <tag>…</tag> or <tag />
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HTML Tags Block Level/Inline Container/Standalone Nesting
Last on / first off
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HTML Tags Attributes Tags vs Elements
Syntax -- <tag attribute=“value”>…</tag> OR <tag attribute=“value” /> Tags vs Elements
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HTML Document Structure
<!DOCTYPE html> <html> <head> </head> <body> </body> </html>
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HTML Tags Head element Meta-data Links Styles/Scripts Comment block
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HTML Tags Body Displayed content Comments
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HTML Tags Comments Syntax -- <!-- Comment goes here -->
Best Practice, particularly for more complex code Code writer may not be same person who has to maintain it later Not secure
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HTML Special Characters
Needed for literal display of characters that have special meaning to web browsers Examples -- < > & © “ Syntax -- < > & © "
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HTML Lists Ordered Unordered Definition List Items Nesting
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HTML Links Connect to other resources Internal / External Relative / Absolute Syntax -- <a href=“URL”>Link Text</a> Paths In-page
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HTML Images Inline standalone
Syntax -- <img src=“image.jpg” alt=“alternative text” /> Must have alt attribute Formats GIF JPG PNG
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HTML Images - Captions Syntax <figure> <img… /> <figcaption>…</figcaption> </figure> Optimization Link
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Web Design ‘Usefulness’ How users judge a website
Can be used Achieves a desired goal How users judge a website Content Usability User-centered Web Development Life Cycle
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Web Development Life Cycle
Define mission & target user population Collect user requirements Create & modify conceptual design Create & modify physical design - Coding Testing Implement & market Evaluate & improve
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WDLC - Mission Statement
Every site should have one Different from organizational mission statement What site is intended to accomplish List key parts of site
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