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Page titles
Required
The page <title> MUST Must be present and MUST contain text.
The page <title> MUST Must be updated when the web address URL changes.
The page <title> MUST Must be accurate and informative.
Non-required / best practice
If a page is the Should describe result of a user action or scripted change of context , the text of the <title> SHOULD describe the result or change of context to the user.if either occur
Should The <title> SHOULD be concise.
The page <title> SHOULD Should be unique, if possible.
Unique information SHOULD should come first in the <title>.title. Example: About us | Cornell Alumni
Should match H1 tagThe page <title> SHOULD match (or be very similar to) the top heading in the main content.
Language
Required
- The primary language of the page MUST Must be identified accurately on in the <html> element.The primary language of the page MUST be identified tag with a valid value on the <html> element.
- Inline language changes MUST be identified with a valid lang attribute.
- language code. Example: <html lang="en">
- Valid lang attribute must be used for inline language changes. Example: <p>And then I said in a German accent, <span lang="de">Bach ist ein Komponist.</span>.</p>The language code MUST be valid.
Headings
Required
Headings MUST Must be accurate and informative.
Non-required / best practice
Text that acts as If text looks like a heading visually , or is structurally SHOULD be designated as a true heading in the markup.
Text that does not act as a heading visually or structurally SHOULD NOT be marked as a heading.
Heading text SHOULD be concise and relatively brief.
a heading, use HTML heading tags. Example: <h2>The history of Cornell University</h2>
Do not use HTML heading tags for anything other than true headings
Should be concise
Should convey Headings SHOULD convey a clear and accurate structural outline of the sections of content of a web page .content
Should not Headings SHOULD NOT skip hierarchical levels .Example: Don't jump from <h2> to <h4>
Beginning of main content should The beginning of the main content SHOULD start with <h1>.
Should only have Most web pages SHOULD have only one <h1>.
Navigation
Required
- Navigation patterns that are repeated on web pages MUST be presented in the same relative order each time they appear and MUST NOT change order when navigating through the site.
- A skip link MUST be either visible at all times or visible on keyboard focus.
- The reading order MUST be logical and intuitive.
- The navigation order of focusable elements MUST be logical and intuitive.
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