This document can be for sale in non-normative platforms, available from Alternate Versions of site content Accessibility recommendations 2.0.
Site content Accessibility Guidelines (WCAG) 2.0 defines making site content more available to people who have disabilities. Accessibility involves a number of disabilities|range that is wide of, including visual, auditory, physical, speech, intellectual, language, learning, and neurological disabilities. Although these recommendations cover a broad array of problems, they’re not in a position to address individuals with all sorts, levels, and combinations of impairment. These instructions additionally make site content more usable by older those with changing abilities because of aging improve usability for users generally speaking.
WCAG 2.0 is developed through the process that is w3C cooperation with people and businesses throughout the world, with a target of supplying a shared standard for site content accessibility that fulfills people, businesses, and governments internationally. WCAG 2.0 builds on WCAG 1.0 WCAG10 and it is built to use broadly to various online technologies now and in the long term, also to be testable with automatic evaluation and peoples evaluation. For the introduction to WCAG, start to see the site content Accessibility recommendations (WCAG) Overview.
Internet accessibility depends not merely on available content but in addition on available internet explorer as well as other individual agents. Authoring tools a crucial role in online accessibility. For a synopsis of just how these the different parts of internet interaction and development come together, see:
WCAG 2.0 Levels of Guidance
The people and businesses which use WCAG vary commonly and can include web site designers and designers, policy manufacturers, buying agents, instructors, and pupils. So that you can meet up with the varying requirements with this market, a few layers of guidance are supplied including general maxims, basic directions, testable success requirements and an abundant number of enough strategies, advisory methods, and reported typical problems with examples, resource links and code.
Concepts – at the very top are four axioms providing for online accessibility: perceivable, operable, understandable, and robust. See additionally Knowing the Four Principles of Accessibility.
Recommendations – beneath the maxims are tips. The 12 instructions supply the fundamental objectives that writers should work toward content more available to users with various disabilities. The rules aren’t testable, but give you the framework and objectives that are overall assist writers comprehend the success requirements and better implement the practices.
Success Criteria – For each guideline, testable success requirements are given to permit WCAG 2.0 where demands and conformance screening such as for example in design specification, buying, legislation, and contractual agreements. So that you can requirements of various teams and situations that are different three quantities of conformance are defined: A (cheapest), AA, and AAA (greatest). Extra information on WCAG amounts are located in Understanding Levels of Conformance.
Enough and Advisory practices – For all the tips and success requirements into the WCAG 2.0 document it self, the group that is working additionally documented strategies. The techniques are informative and end up in two groups: those who are adequate for fulfilling the success requirements which are advisory. The advisory strategies exceed what is needed because of the specific success requirements and enable writers to raised target . Some advisory strategies address accessibility barriers that aren’t included in the testable success requirements. Where failures that are common understood, they are additionally documented. See additionally enough and Advisory Techniques in Understanding WCAG 2.0.
A few of these levels of guidance (axioms, instructions, success requirements, and enough and advisory strategies) come together to offer assistance with steps to make content more available. Writers are encouraged to see thereby applying all levels they are capable, like the advisory strategies, so that you can most readily useful target the widest feasible array of users.
Keep in mind that even content that conforms during the greatest level (AAA) available to people with all types, levels, or combinations of impairment, especially in the intellectual language and learning areas. Writers ought to look at the complete array of strategies, like the advisory methods, along with to get appropriate advice about present practice that is best site content , in terms of feasible, to this community. Metadata may help users in finding content the best option for his or her requirements.
WCAG 2.0 Supporting Documents
The WCAG 2.0 document is made to meet up with the requirements who need a reliable, referenceable technical standard. Other documents, called supporting documents, are centered on the WCAG 2.0 document and target other essential purposes, like the power become updated to explain just how WCAG could be used with brand new technologies. Supporting papers consist of:
How exactly to Meet WCAG 2.0 – A customizable reference that is quick WCAG 2.0 which includes all the directions, success requirements, and processes for writers because they are developing and assessing content.
Understanding WCAG 2.0 – helpful tips to understanding and WCAG that is implementing 2.0. There is certainly a quick «Learning» document success and guideline criterion in WCAG 2.0 also key subjects.
approaches for WCAG 2.0 – an accumulation of practices and typical problems, each in a split document that carries a description, examples, rule and tests.
The WCAG 2.0 Documents – A diagram and description of how a documents that are technical related and connected.
See site content Accessibility tips (WCAG) Overview for the description of this WCAG 2.0 material that is supporting including training resources pertaining to WCAG 2.0. Extra resources addressing subjects for instance the company instance for online accessibility, preparing implementation the accessibility of the web sites, and accessibility policies are placed in WAI Resources.
Crucial Terms in WCAG 2.0
WCAG 2.0 includes three crucial terms being various from WCAG 1.0. Each one of these is introduced briefly below and defined more completely within the glossary.
It is vital to keep in mind that, in this standard, «Web page» includes a whole lot more than fixed HTML pages. Additionally includes the increasingly powerful website pages which are appearing on the net, including «pages» provide whole digital interactive communities. As an example, the word «Web web page» includes an immersive, interactive experience that is movie-like at a solitary URI. For more information, see Understanding «Web webpage».
A few success criteria require that content (or particular aspects of content) could be «programmatically determined.» Which means that the information is delivered in a way that individual agents, including technologies that are assistive can draw out and present these records to users in numerous modalities. For lots additional information, see Understanding Programmatically Determined.
Employing a technology in a real way that is accessibility supported means with assistive technologies (AT) accessibility attributes of os’s, browsers, along with other individual agents. Technology features can just only be relied upon to adapt to WCAG 2.0 success requirements if they’re found in a real method that is «accessibility supported». Technology features may be used in many ways which are not accessibility supported (don’t assist assistive technologies, etc.) provided that they’re not relied upon to conform to any success criterion ( in other words., the information that is same functionality can be available another method that is supported).
This is of «accessibility supported» is supplied when you look at the Appendix A: section that is glossary of tips. to learn more, see Understanding Accessibility Support.
Understanding Guideline 1.1
1.1.1 Non-text Content: All non-text content that is presented into the individual possesses text alternative that acts very same function, aside from the circumstances down the page. (Level A)
Controls, Input: If non-text content is a control or takes individual input, then it’s a title that defines its function. (make reference to Guideline 4.1 for extra needs for settings and content that takes user input.)
Time-Based Media: If non-text content is time-based media, then text alternatives at least provide descriptive recognition associated with non-text content. (relate to Guideline 1.2 for extra needs for news.)
Test: then text alternatives at least provide descriptive identification of the non-text content if non-text content is a test or exercise that would be invalid if presented in text.
Sensory: If non-text content is mainly meant to create a particular sensory experience, then text alternatives at least provide descriptive identification regarding the non-text content.
CAPTCHA: then text alternatives that identify and describe the purpose of the non-text content are provided, and alternative forms of CAPTCHA using output modes for different types of sensory perception are provided to accommodate different disabilities if the purpose of non-text content is to confirm that content is being accessed by a person rather than a computer.