WCAG (Web Content Accessibility) Guidelines
Instructions for accessing WCAG 2.0
cover a wide range of topics and recommendations to make the web content more
accessible. With the help of these guidelines, the content can be accessed by a
wider range of people with disabilities such as:
and decreased vision
and reduced hearing
combination of the aforementioned
In addition, adhering to these
guidelines will make the web content easier to use for all users.
There are 3 levels of WCA: A, AA and AAA. Our proposal goes beyond all levels, and we have incorporated techniques that cover all levels of accessibility
Specifically, WCAG 2.0 offers:
- Text Alternatives: an alternative text or any
non-textual content are provided, so that it can be changed to the forms
helpful to users such as large prints, Braille system, speech, symbols or
- Keyboard Accessibility: all functions can be done with the
use of the the keyboard.
- Time based Media: time-based media alternatives are
- Adaptability: content can be presented in
different ways without loss of information or structure.
- A Distinguishable website: it facilitates users to see and hear
content, including the separation between foreground and background.
- Enough time to read and use the content.
- Prevention of Seizures: content is not designed in a way
that has been shown to cause seizures.
- Navigable navigation: it helps users to navigate find
content, and determine their current location.
- Readability: it makes a text content easy to
read and understand.
- Predictability: it makes websites appear and work
in predictable ways.
- Input Assistance: it helps users avoid and correct
- Compatibility: it maximizes compatibility with
current and future user agents, including support technologies.
WCAG 2.0 I instructions
Comprehensible content by:
alternative texts for any content that is not available in text format, so that
it can be rendered in other forms that users need, such as in capital letters,
Braille, speech, symbols, or in simpler language,
alternatives for time-dependent multimedia,
content that can be presented in different ways (for example with a simpler
layout), without losing information or structure,
audiovisual perception of the content, including distinguishing background
WCAG 2.0 II instructions
Functional content means:
- making possible to use all the functions via a
users with sufficient time to read and use the content,
designing content in a way that is known to cause seizures due to
mechanisms to help users locate, navigate, and navigate content.
WCAG 2.0 III instructions
Understandable content means that:
content in text form must be readable and understandable.
must be created with predictable layout and functionality.
website helps users to avoid and correct any errors.
WCAG 2.0 IV instructions
Enhancement of compatibility with current and future user agents, including support technologies.
Compliance Requirements I
- There are three levels of compliance (A – AA – AAA).
- Although compliance can only be achieved at specified levels, content authors are encouraged to report (at their own discretion) any progress toward meeting success criteria across all levels beyond the level of compliance that has been achieved.
- AAA-level compliance should not be required as a general policy for entire pages, as some content may not meet all AAA-level success criteria.
Compliance Requirements II
- Complete pages: Compliance applies to full websites and cannot be achieved if part of the website is excluded.
Compliance Requirements III
- Complete process: When a website belongs to a group of websites that present a process (i.e. a series of steps that must be completed in order to finish an activity) all the websites of the process must comply with the exact or a higher level.
- Example: An online store has a number of pages used to select and purchase products. In order for any page to be compliant, it must be compliant with each of the pages involved in the process from start to finish (checkout).
Compliance Requirements IV
Technology should only be used
in ways that support accessibility:
Any information or functionality
provided in a way that does not facilitate accessibility, should also be
available in a form that has accessibility support.