Bootstrap follows common web standards and—with minimal extra effort—can be used to create sites that are accessible to those using <abbrtitle="Assistive Technology"class="initialism">AT</abbr>.
If your navigation contains many links and comes before the main content in the DOM, add a `Skip to main content` link [before the navigation](http://a11yproject.com/posts/skip-nav-links/). Using the `.sr-only` class will visually hide the skip link, and the `.sr-only-focusable` class will ensure that the link becomes visible once focused (for sighted keyboard users).
<ahref="#content"class="sr-only sr-only-focusable">Skip to main content</a>
<divclass="container"id="content">
The main page content.
</div>
</body>
{% endhighlight %}
### Nested headings
When nesting headings (`<h1>` - `<h6>`), your primary document header should be an `<h1>`. Subsequent headings should make logical use of `<h2>` - `<h6>` such that screen readers can construct a table of contents for your pages.
Learn more at [HTML CodeSniffer](http://squizlabs.github.io/HTML_CodeSniffer/Standards/Section508/) and [Penn State's Accessability](http://accessibility.psu.edu/headings).
### Additional resources
- ["HTML Codesniffer" bookmarklet for identifying accessibility issues](https://github.com/squizlabs/HTML_CodeSniffer)
