问题描述
WCAG 制定 3 个优先级的目的是什么?
What is the purpose of making 3 priority level by WCAG?
像吗?
- 如果客户不支付额外费用或者我们没有太多时间,那就去吧A
- 如果客户付款,或者我们有时间使网站兼容至少AA
- 如果客户付款并需要根据政府.规则然后去AAA
如果我们正在制作网站,那么我们应该尝试达到哪个级别,或者我们应该只根据客户要求做?
If we are making site then which level we should we try to achieve, or we should do only on client request?
Although i found these definitions on this site but these are confusing for me
• 优先级 1:供所有用户访问Web 内容和 Web 开发人员为了达到一致性级别A",这些必须满足要求.
• 优先级 2:这些要求网络应该满足开发人员,以便没有组找到它难以访问网络内容从而达到一致性级别AA".
• Priority 2: These requirements should be satisfied by the Web developers so that no group finds it difficult to access the Web content and so as to attain Conformance level "AA".
• 优先级 3:这些要求可能让 Web 开发人员满意为访问 Web 内容提供便利一些组并达到一致性AAA"级.
• Priority 3: These requirements may be satisfied by the Web developers to facilitate access to Web content for some groups and attain Conformance level "AAA".
推荐答案
WCAG 2.0 分为三个一致性级别 (A-AA-AAA),因为成功标准是根据它们对设计或视觉呈现的影响来组织的页面.级别越高,对设计的约束越多.
WCAG 2.0 is divided into three conformance levels (A-AA-AAA) because the success criteria are organised based on the impact they have on design or visual presentation of the pages. The higher the level, the more restraining it becomes on design.
例如,让我们以准则 1.4(可区分)为例,该准则旨在让用户更容易看到和听到内容,包括将前景与背景分开.
For example, let's take guideline 1.4 (Distinguishable), which is about making it easier for users to see and hear content including separating foreground from background.
- 成功标准 1.4.1 是关于颜色的使用.规则是这样的this:颜色不是唯一的视觉传达方式信息,表示一个动作,提示响应,或区分视觉元素.(A级)
- 成功标准 1.4.3 是关于对比度(最低).规则去像这样:视觉呈现文本和文本图像有一个对比度至少为 4.5:1,除了以下内容:(AA级)
- 最后,成功标准 1.4.6是关于对比度(增强).而规则是这样的:视觉文本和图像的呈现文本的对比度至少为7:1,以下除外:(水平AAA)
如您所见,我们得到的越高,它的要求就越高,并且它对如何在网页中呈现内容施加的压力也越大.
As you can see, the more higher we get, the more demanding it becomes and the more pressure it put on how things can be presented in the web page.
根据经验,A 级的成功标准应该不可见或几乎不会被界面注意到.另一方面,AAA 级将对设计产生如此大的影响,甚至 W3C 也声称大多数组织将无法达到该级别(因为对设计的妥协太重要了):
As a rule of thumb, success criteria from level A should be invisible or barely noticeable to the interface. On the other hand, level AAA will have such a high impact on design, that even the W3C claims that most organizations will not be able to achieve that level (as the compromises on design will be too important):
来源:http://www.w3.org/TR/WCAG20/#一致性请求 (WCAG 2.0) - 来自 W3C
Source: http://www.w3.org/TR/WCAG20/#conformance-reqs (WCAG 2.0) - from the W3C
注意 2:不建议将 AAA 级一致性作为整个站点的一般策略,因为不可能满足某些内容的所有 AAA 级成功标准."
"Note 2: It is not recommended that Level AAA conformance be required as a general policy for entire sites because it is not possible to satisfy all Level AAA Success Criteria for some content."
在任何给定项目中努力实现一个或另一个一致性级别的合规性不应与客户支付或不支付的费用有任何关系.它应该始终是尽你所能(当然在资源和预算范围内)以确保所有用户,无论是否有残疾或限制,都可以享受提供给公众的内容.在涉及政府内容时尤其如此.
Working towards compliance to one conformance level or another in any given project shouldn't have anything to do with what the client pays or doesn't pay. It should always be about making everything you can (within the boundaries of resources and budget of course) to ensure that all users, regardless of disabilities or limitations, can enjoy the content that is provided to the public. And this is especially true when it comes to government content.
这篇关于为什么 WCAG 制定了 3 个级别“A"、“AA"?和“AAA"?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!