Tuesday, March 8, 2011

Web Accessibility task (Draft)

Part One

1. What is in WCAG 2.0?

It has 12 guidelines that are under 4 principles which are "perceivable", "Operable", "understandable", and "Robust" each one has a testable success criteria which has three levels A,AA and AAA.

2. Who poduces WCAG 2.0?

The people who produce WCAG 2.0 is the web content accessiblity guidelines working group or WCAG WG for short. They are part of the W3C (World wide web consortium) web accessibility initiative (WAI).

3. Who are the guidelines design to assist?

The guidelines are designed to assist web content developers, web authoring tool developers, web accessibility evaluation tool developers and other people who need or want the standereds for web accessibility.

4. What are the essential components of Web Accessibility?

The essential components of web accessibility are content, web browsers, media players, assistive technology, users, developers, authoring tools, evaluation tools.

Part Two:
Choose one guideline from each of the four principals (perceivable, operable, understandable, and robust) and discuss the ‘intent’, benefits & give an example of use.

Perceivable -
"1.3 Adaptable: Create content that can be presented in different ways (for example simpler layout) without losing information or structure."

1.3.1
Intent: to ensure that info and relationships are implied through visual or auditory formatting are preserved when presentation format changes.

Benefits: Helps people with disabilities by allowing users agents to adapt content accordingly to the needs of the users. Blind users benefit when he information is conveyed through color is also there in text. Deaf - Blind users using braille may be unable to access color dependent information.

Example: A text document where its formatted with 2 blank lines befor the titles, asterisks that indicate list items and othere fomatting conventions so that structure can be programmatically determined.

1.3.2
Intent:to enable user agents to provide alternative presentation of the content while perserving reading order needed to understand meaning.

Benefits: help people who rely on assistive tech that reads text out load.

Example: css is used to postition a nav bar, main story of a page and side story. the visuals dont match programmatically but the meaning of the page doesnt depend on that order of the sections.

1.3.3
Intent: ensure all users can gain access to instructions for using content even when they connot perceive shape or size or use of information about spatial location or orientation.

Benefits: Blind and low vision users may not understand info if conveyed by shape or location.

Example: an online multi page survey has a link as a green icon in the lower right hand corner. the arrow is cearly labled "next" with the instructions "move to the next section" the example uses both positioning, color and labeling to identify the icon.

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