Thursday, September 3, 2009
Accessible Web design
Main article: Web accessibility
To be accessible, web pages and sites must conform to certain accessibility principles. These accessibility principles are known as the WCAG when talking about content. These can be grouped into the following main areas.[1]
* Use semantic markup that provides a meaningful structure to the document (i.e. web page)
* Semantic markup also refers to semantically organizing the web page structure and publishing web services description accordingly so that they can be recognized by other web services on different web pages. Standards for semantic web are set by IEEE
* Use a valid markup language that conforms to a published DTD or Schema
* Provide text equivalents for any non-text components (e.g. images, multimedia)
* Use hyperlinks that make sense when read out of context. (e.g. avoid "Click Here.")
* Don't use frames
* Use CSS rather than HTML tables for layout.
* Author the page so that when the source code is read line-by-line by user agents (such as a screen readers) it remains intelligible. (Using tables for design will often result in information that is not.
However, W3C permits an exception where tables for layout either make sense when linearized or an alternate version (perhaps linearized) is made available.
Website accessibility is also changing as it is impacted by Content Management Systems that allow changes to be made to webpages without the need of obtaining programming language knowledge.
To be accessible, web pages and sites must conform to certain accessibility principles. These accessibility principles are known as the WCAG when talking about content. These can be grouped into the following main areas.[1]
* Use semantic markup that provides a meaningful structure to the document (i.e. web page)
* Semantic markup also refers to semantically organizing the web page structure and publishing web services description accordingly so that they can be recognized by other web services on different web pages. Standards for semantic web are set by IEEE
* Use a valid markup language that conforms to a published DTD or Schema
* Provide text equivalents for any non-text components (e.g. images, multimedia)
* Use hyperlinks that make sense when read out of context. (e.g. avoid "Click Here.")
* Don't use frames
* Use CSS rather than HTML tables for layout.
* Author the page so that when the source code is read line-by-line by user agents (such as a screen readers) it remains intelligible. (Using tables for design will often result in information that is not.
However, W3C permits an exception where tables for layout either make sense when linearized or an alternate version (perhaps linearized) is made available.
Website accessibility is also changing as it is impacted by Content Management Systems that allow changes to be made to webpages without the need of obtaining programming language knowledge.
web design
Web design is the skill of creating presentations of content (usually hypertext or hypermedia) that is delivered to an end-user through the World Wide Web, by way of a Web browser or other Web-enabled software like Internet television clients, microblogging clients and RSS readers.
The process of designing Web pages, Web sites, Web applications or multimedia for the Web may utilize multiple disciplines, such as animation, authoring, communication design, corporate identity, graphic design, human-computer interaction, information architecture, interaction design, marketing, photography, search engine optimization and typography.
* Markup languages (such as HTML, XHTML and XML)
* Style sheet languages (such as CSS and XSL)
* Client-side scripting (such as JavaScript)
* Server-side scripting (such as PHP and ASP)
* Database technologies (such as MySQL and PostgreSQL)
* Multimedia technologies (such as Flash and Silverlight)
Web pages and Web sites can be static pages, or can be programmed to be dynamic pages that automatically adapt content or visual appearance depending on a variety of factors, such as input from the end-user, input from the Webmaster or changes in the computing environment (such as the site's associated database having been modified).
With growing specialization within communication design and information technology fields, there is a strong tendency to draw a clear line between web design specifically for web pages and web development for the overall logistics of all web-based services.
The process of designing Web pages, Web sites, Web applications or multimedia for the Web may utilize multiple disciplines, such as animation, authoring, communication design, corporate identity, graphic design, human-computer interaction, information architecture, interaction design, marketing, photography, search engine optimization and typography.
* Markup languages (such as HTML, XHTML and XML)
* Style sheet languages (such as CSS and XSL)
* Client-side scripting (such as JavaScript)
* Server-side scripting (such as PHP and ASP)
* Database technologies (such as MySQL and PostgreSQL)
* Multimedia technologies (such as Flash and Silverlight)
Web pages and Web sites can be static pages, or can be programmed to be dynamic pages that automatically adapt content or visual appearance depending on a variety of factors, such as input from the end-user, input from the Webmaster or changes in the computing environment (such as the site's associated database having been modified).
With growing specialization within communication design and information technology fields, there is a strong tendency to draw a clear line between web design specifically for web pages and web development for the overall logistics of all web-based services.
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