This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "About URI scheme" – news · newspapers · books · scholar · JSTOR(September 2010) (Learn how and when to remove this template message)
This article may contain an excessive amount of intricate detail that may interest only a particular audience. Please help by spinning off or relocating any relevant information, and removing excessive detail that may be against Wikipedia's inclusion policy.(March 2021) (Learn how and when to remove this template message)
This article needs to be updated. Please help update this article to reflect recent events or newly available information.(May 2021)
(Learn how and when to remove this template message)
about 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. It is an IANA officially registered scheme, and is standardized.[1]
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. Similarly, in early versions of Internet Explorer, about: followed by a string of HTML (e.g. about:<em>hello world</em>) 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. 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).[2][3]
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. 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. Examples are opera (Opera) or chrome (Google Chrome). An exception is about:blank, which is not translated.
about is an internal URIscheme (also known as a "URL scheme" or, erroneously, "protocol") implemented in various Web browsers to reveal internal state...
The geo URIscheme is a Uniform Resource Identifier (URI) scheme defined by the Internet Engineering Task Force's RFC 5870 (published 8 June 2010) as:...
resource identifier (URI) scheme is a specific format of URI, used to specifically identify a file on a host computer. While URIs can be used to identify...
hosting service AboutURIscheme, an internal URIschemeAbout box, a dialog box that displays information related to a computer software About equal sign...
a Uniform Resource Identifier (URI) scheme which enables identifiers from public namespaces to be represented as URIs, when they would otherwise have...
reminder that some URIs act as addresses by having schemes implying network accessibility, regardless of any such actual use. As URI-based standards such...
acct URIscheme is a proposed internet standard published by the Internet Engineering Task Force, defined by RFC 7565. The purpose of the scheme is to...
a fragment, the fragment follows the query. Query parts depend on the URIscheme and are evaluated by the server—e.g., http: supports queries unlike ftp:...
private. The Uniform Resource Identifier (URI) scheme HTTPS has identical usage syntax to the HTTP scheme. However, HTTPS signals the browser to use...
later than 2.0, about:mozilla displays the same Book of Mozilla verse from the Firefox trunk build that it was built off of. about: URIscheme Mozilla (mascot)...
"apps" for the same site, to easily switch between different accounts. AboutURIscheme § GNOME Web Midori, another web browser formerly based on GTK and WebKitGTK...
system identifier), although a system identifier of about:legacy-compat (using the about: URIscheme) is condoned. The XML representation (XHTML), by contrast...
Resource Identifier (URI). The syntax of the URI follows the general standard syntax also used in Web services and e-mail. The URIscheme used for SIP is sip...
CURIE (or Compact URI) defines a generic, abbreviated syntax for expressing Uniform Resource Identifiers (URIs). It is an abbreviated URI expressed in a...
referrer hiding method is to convert the original link URL to a Data URIscheme-based URL containing small HTML page with a meta refresh to the original...
resolution process, thus solving the problem of transitory URIs in location-based URIschemes like HTTP. Technically the string resolution on PURL is like...
Identifier (XRI) is a scheme and resolution protocol for abstract identifiers compatible with Uniform Resource Identifiers (URI) and Internationalized...
as violating the Web Architecture good practice of reusing existing URIschemes. Nevertheless, the explicit separation of data from metadata; specification...
such as XQuery The URI specification itself has sufficient richness to express a functional programming language. The active URIscheme was proposed by Hewlett-Packard...
a URI, namely the 'pure-identity URI' representation that is intended for use when referring to a specific physical object in communications about EPCs...
23 April 2012. DOI is a registered URI under the info URIscheme specified by IETF RFC 4452. info:doi/ is the infoURI Namespace of Digital Object Identifiers...
clerk of a court Computer file, a resource for storing information file URIscheme file (command), a Unix program for determining the type of data contained...
files. Base64 can be used to embed PDF files in HTML pages. The data URIscheme can use Base64 to represent file contents. For instance, background images...
an error message in Chromium and Google Chrome; see AboutURIscheme § Chromium-specific about: URIs "Squats" (song), a 2015 song by Oh Snap! and Bombs...
messaging, or another vector, including a different browser. The data URIscheme offers an alternative for including separate elements such as images,...
Identifiers The ARK Identifier Scheme, Internet Engineering Task Force The “ark” URIscheme (specification of ARK as URI). Name-to-Thing Resolver Noid...