Term:URL [Uniform Resource Locator]

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URL is an acronym for Uniform Resource Locator.

A URL is a way to specify a resource, such as a webpage, file or a service, on the internet. In what is by far the most common usage, a URL is simply the full web address of a webpage. For example, this page is identified by the URL

https://askleo.com/glossary/url/

A URL is made up of several components.

  • Protocol or “scheme”: the “language” used to exchange data for this specific type of resource.
  • Server or host: the computer (or computers) on the network that provide the resource.
  • Location or path: the location on the server containing the resource.
  • Name: the name of the resource to be accessed. (Technically considered part of the location.)
  • Parameters or query: additional information used to customize the resource, or to be included with the request for other purposes.
  • Anchor or fragment: additional information that indicates which portion of the resource should be accessed.

Many of the components are optional.

The most recognizable indicator of something being a URL is the “://” between the protocol and server. Using the terms above in brackets, a URL is constructed as follows:

<protocol>://<server>/<location>/<name>?<parameters>#<anchor>

Http and https are two examples of protocols, but you may also commonly see “ftp”, for File Transfer Protocol, and others.

URL (Wikipedia)

URL
Uniform Resource Locator
StatusPublished
First published1994; 27 years ago (1994)
Latest versionLiving Standard
2021
OrganizationInternet Engineering Task Force (IETF)
CommitteeWeb Hypertext Application Technology Working Group (WHATWG)
SeriesRequest for Comments (RFC)
EditorsAnne van Kesteren
AuthorsTim Berners-Lee
Base standardsRFC 3986. – Uniform Resource Identifier (URI): Generic Syntax.

RFC 4248. – The telnet URI Scheme.
RFC 4266. – The gopher URI Scheme.
RFC 6068. – The ‘mailto’ URI Scheme.
RFC 6196. – Moving mailserver: URI Scheme to Historic.

RFC 6270. – The ‘tn3270’ URI Scheme.
Related standardsURI, URN
DomainWorld Wide Web
LicenseCC BY 4.0
AbbreviationURL
Websitehttps://url.spec.whatwg.org

A Uniform Resource Locator (URL), colloquially termed a web address, is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identifier (URI), although many people use the two terms interchangeably. URLs occur most commonly to reference web pages (http), but are also used for file transfer (ftp), email (mailto), database access (JDBC), and many other applications.

Most web browsers display the URL of a web page above the page in an address bar. A typical URL could have the form http://www.example.com/index.html, which indicates a protocol (http), a hostname (www.example.com), and a file name (index.html).


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