References a blank HTML document with the media type text/html and character encoding UTF-8. The about URIs that have since been defined and assigned by IANA are listed below. In August 2012, it was published as an official Request for Comments as RFC 6694. In 2010, and onwards, there are efforts to standardize the about URI scheme, and define the processing requirements for some specific URIs, in the IETF Applications Area Working Group (APPSAWG).
An exception is about:blank, which is not translated. Examples are opera ( Opera) or chrome ( Google Chrome). Some browsers use URIs beginning with the name of the browser for similar purposes, and many about URIs will be translated into the appropriate URI if entered. The most commonly implemented about URIs are about:blank, which displays a blank HTML document, and simply about:, which may display information about the browser. Still other versions of Netscape would return various phrases in response to an unknown about URI, including "Whatchew talkin' 'bout, Willis?" (a catch phrase from the TV show Diff'rent Strokes) or "Homey don't play dat!" (from a recurring skit on the TV show In Living Color). about:hello world) would render that string as though it were the source of the page - thus providing a similar (though more limited) facility to the data: URI scheme defined by RFC 2397. Similarly, in early versions of Internet Explorer, about: followed by a string of HTML (e.g. In early versions of Netscape, any URI beginning with about: that wasn't recognized as a built-in command would simply result in the text after the colon being displayed. It is an IANA officially registered scheme, and is standardized. ( Learn how and when to remove this template message)Ībout is an internal URI scheme (also known as a " URL scheme" or, erroneously, " protocol") implemented in various Web browsers to reveal internal state and built-in functions. Please help update this article to reflect recent events or newly available information.
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