Windows 8 pinning functionality for websites.
Identifies administrators for a page which will be able publish data to your wall if you like any content within this page.
Contains language specific links.
Customize the snippet people see when your page is shared on Google+
Public specification of a preferred URL for a page allows search engines to understand the original location for content.
Page contains links to disable or enable DNS prefetching of links in the page.
Allows a website to define how a page is rendered in Internet Explorer 8, allowing a website to decide to use IE7 style rendering over IE8 rendering.
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
[url] uses conditional comments that are supported by Microsoft Internet Explorer. They allow web developers to show or hide HTML code based on the version of the viewer's browser.
Tags that webmasters can use to markup their pages in ways recognized by major search providers.
The DOCTYPE is a required preamble for HTML5 websites.
This page contains tags that are specific to an HTML 5 implementation.
A way to make Web content and Web applications more accessible to people with disabilities. It especially helps with dynamic content and advanced user interface controls developed with Ajax, HTML, JavaScript, and related technologies.
The page shows content with an iframe; an embedded frame that loads another webpage.
JavaScript is a scripting language most often used for client-side web development.
Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML