Public specification of a preferred URL for a page allows search engines to understand the original location for content.
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
Openid single digital identity via the use of OpenID.
[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.
Twitter cards make it possible for you to attach media experiences to Tweets that link to your content.
The DOCTYPE is a required preamble for HTML5 websites.
RDF Schema provides a data-modelling vocabulary for RDF data.
Defines the attributes of a web app in a simple JSON file. It describes how the web app should appear on the users system and how it should launch.
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.
A mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
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
JavaScript is a scripting language most often used for client-side web development.
The description attribute provides a concise explanation of the page content.