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"URL" redirects here. For other uses, see URL (disambiguation).
The relationship of URL to URI and URN
.In computing, a Uniform Resource Locator (URL) is a subset of the Uniform Resource Identifier (URI) that specifies where an identified resource is available and the mechanism for retrieving it.^ Uniform or universal resource locator or URL articles .
  • Uniform or universal resource locator or URL : DaveChaffey.com Internet Marketing 17 January 2010 10:24 UTC www.davechaffey.com [Source type: General]

 ^ In most technical documents it is a synonym for Uniform Resource Identifier (URI).
  • Uniform Resource Locator - SuperbHosting.net Support Wiki 17 January 2010 10:24 UTC www.superbhosting.net [Source type: Reference]

 ^ Uniform Resource Locator (URL) A technique for indicating the name and location of Internet resources.
  • Dublin Core User's Guide Glossary 17 January 2010 10:24 UTC library.csun.edu [Source type: Reference]
  • DCMI Glossary 17 January 2010 10:24 UTC dublincore.org [Source type: Reference]

 .In popular usage and in many technical documents and verbal discussions it is often incorrectly used as a synonym for URI,[1] the best-known example of which is the 'address' of a web page on the World Wide Web.^ In most technical documents it is a synonym for Uniform Resource Identifier (URI).
  • Uniform Resource Locator - SuperbHosting.net Support Wiki 17 January 2010 10:24 UTC www.superbhosting.net [Source type: Reference]

 ^ Address of any resource on the World Wide Web .

 ^ The World Wide Web is one of the many facets of the Internet.
  • IHS Web Site Help Center - FAQs 17 January 2010 10:24 UTC www.ihs.gov [Source type: General]

Contents

History

.The Uniform Resource Locator was created in 1994[2] by Tim Berners-Lee as part of the URI.[3] Berners-Lee regrets the use of dots to separate the route to the server in the URI, and wishes he had used slashes for the whole thing.^ How to refer to a uniform resource locator .
  • Questions about Uniform Resource Locator - Ask.com 17 January 2010 10:24 UTC www.ask.com [Source type: General]

 ^ Is url uniform resource locator or universal resource locator?
  • WikiAnswers - What does the prefix 'http' in the web page's uniform resource protocol stand for 17 January 2010 10:24 UTC wiki.answers.com [Source type: General]

 ^ URL, uniform resource locator .
  • URL, uniform resource locator | Internet Ad Sales 17 January 2010 10:24 UTC www.internetadsales.com [Source type: FILTERED WITH BAYES]

 [4] .For example, http://www.serverroute.com/path/to/file.html would look like http:com/serverroute/www/path/to/file.html.^ Example 2: Link http://www.web-hosting-top.com/web-hosting/news is correct, but link HTTP://WWW.WEB-HOSTING-TOP.COM/WEB-HOSTING/NEWS will bring error page.
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ MidLink: Teacher's Guide Integrating the Web into Your Curriculum URL: http://www.ncsu.edu/midlink/resource.html .
  • Internet Resources for Middle School Educators 20 September 2009 5:19 UTC www.midgefrazel.net [Source type: Academic]

 ^ For example, if the contents of the URL: http://java.sun.com/index.html contained within it the relative URL: FAQ.html it would be a shorthand for: http://java.sun.com/FAQ.html The relative URL need not specify all the components of a URL. If the protocol, host name, or port number is missing, the value is inherited from the fully specified URL. The file component must be specified.
  • URL (Java 2 Platform SE v1.4.2) 20 September 2009 5:19 UTC java.sun.com [Source type: Reference]
  • URL (Java Platform SE 6) 20 September 2009 5:19 UTC www.math.shu.edu [Source type: Reference]

 .Berners-Lee has also admitted that the two forward slashes trailing the scheme were unnecessary.^ By the way, the reason why mailto: and news: do not have two forward slashes (//) after the protocol identifier is because they are fetched from local servers, not remote servers.
  • Meatball Wiki: UniformResourceLocator 17 January 2010 10:24 UTC meatballwiki.org [Source type: FILTERED WITH BAYES]

 ^ Additionally, the hostname of a WWW address begins with two forward slashes.
  • What is a URL? - An introduction to the URL with explanations for the layman. Includes a comparison and explains the differences between the URL and URI. 20 September 2009 5:19 UTC what-is-what.com [Source type: Reference]

 ^ In the protocol portion of a URL, specify the protocol followed by a colon and two forward slashes, as in: :// Server ID Portion of the URL .
  • Purveyor Administrator's Guide - Uniform Resource Locators 17 January 2010 10:24 UTC vms.process.com [Source type: Reference]

 [5]

Syntax

Main article: URI scheme#Generic syntax
.Every URL consists of some of the following: the scheme name (commonly called protocol), followed by a colon, then, depending on scheme, a hostname (alternatively, IP address), a port number, the path of the resource to be fetched or the program to be run, then, for programs such as Common Gateway Interface (CGI) scripts, a query string,[6][7] and with HTML documents, an anchor (optional) for where the page should start to be displayed.^ If the URL scheme or the URLStreamHandler for the URL do not define a default port number, then -1 is returned.
  • URL (Java 2 Platform SE v1.4.2) 20 September 2009 5:19 UTC java.sun.com [Source type: Reference]
  • URL (Java Platform SE 6) 20 September 2009 5:19 UTC www.math.shu.edu [Source type: Reference]

 ^ URLs always start with the protocol of the server, followed by a colon, in this case the Web's http: .
  • What is a Uniform Resource Locator? 17 January 2010 10:24 UTC www.uic.edu [Source type: Reference]

 ^ A full URL consists of a service name, followed by a colon and a hostname, optionally followed by a colon and a port number, followed by a path which ends in a filename or directory.
  • What is a URL? - An introduction to the URL with explanations for the layman. Includes a comparison and explains the differences between the URL and URI. 20 September 2009 5:19 UTC what-is-what.com [Source type: Reference]

 [8]
The combined syntax is
scheme://username:password@domain:port/path?query_string#anchor
.
  • The scheme name, or resource type, defines its namespace, purpose, and the syntax of the remaining part of the URL. Most Web-enabled programs will try to dereference a URL according to the semantics of its scheme and a context.^ The scheme name, or resource type, defines its namespace, purpose, and the syntax of the remaining part of the URL. Most Web-enabled programs will try to dereference a URL according to the semantics of its scheme and a context-vbn.
    • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

     ^ Protocols, to enable the exchange of named resources over the Web (HTTP).
    • HTML and URLs 20 September 2009 5:19 UTC www.w3.org [Source type: Reference]

     ^ Every URI (and therefore every URL) begins with the scheme name that defines its namespace, purpose, and the syntax of the remaining part of the URI. Most Web-enabled programs will try to dereference a URI according to the semantics of its scheme and a context-vbn For example, a Web browser will usually dereference a http://example.org/ by performing an HTTP request to the host example.org, at the default HTTP port (see Port 80).
    • Uniform Resource Locator | Nicolae Sfetcu 17 January 2010 10:24 UTC www.sfetcu.com [Source type: General]

     .For example, a Web browser will usually dereference the URL http://example.org:80 by performing an HTTP request to the host example.org, at the port number 80. Dereferencing the URN mailto:bob@example.com will usually start an e-mail composer with the address bob@example.com in the To field.^ For example, a Web browser will usually dereference the URL http://example.org/ by performing an HTTP request to the host example.org, at the default HTTP port (port 80).
    • Uniform Resource Locator 17 January 2010 10:24 UTC www.webcenters.info [Source type: Reference]

     ^ They are the addresses you type in a Web browser Address field that start with http:// , followed by the name of a Web site.
    • URL (Uniform Resource Locator) (Linktionary term) 17 January 2010 10:24 UTC www.linktionary.com [Source type: Reference]

     ^ For example, the default port for http is 80 .
    • URL (Java 2 Platform SE v1.4.2) 20 September 2009 5:19 UTC java.sun.com [Source type: Reference]
    • URL (Java Platform SE 6) 20 September 2009 5:19 UTC www.math.shu.edu [Source type: Reference]

     .
    • Other examples of scheme names include https: gopher:, wais:, ftp:.^ Other examples of scheme names include https : gopher :, wais:, ftp :.
      • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

       ^ Commonly implemented schemes include: ftp , http (World-Wide Web), gopher or WAIS .
      • Uniform Resource Locator - Computing Reference - eLook.org 17 January 2010 10:24 UTC www.elook.org [Source type: Reference]
      • Uniform Resource Locator Definition | Definition of Uniform Resource Locator at Dictionary.com 17 January 2010 10:24 UTC dictionary.reference.com [Source type: Reference]

       ^ Each URL consists of a scheme (HTTP, HTTPS, FTP, or Gopher) and a scheme-specific string.
      • Define URL - Uniform Resource Locator 17 January 2010 10:24 UTC www.birds-eye.net [Source type: Reference]

       .URLs that specify https as a scheme (such as https://example.com/) denote a secure website.
  • The registered domain name or IP address gives the destination location for the URL. The domain google.com, or its IP address 72.14.207.99, is the address of Google's website.
  • The hostname and domain name portion of a URL are case-insensitive since the DNS is specified to ignore case.^ The domain name "pmtpa.wikimedia.org" is not a hostname since it does not have an IP address, but "rr.pmtpa.wikimedia.org" is a hostname.
    • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
    • Uniform Resource Locator 17 January 2010 10:24 UTC www.webcenters.info [Source type: Reference]

     ^ The registered domain name or IP address gives the destination location for the URL. The domain google.com, or its IP address 72.14.207.99 , directs you to where Google's website resides.
    • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

     ^ Next comes the hostname (domain name or IP address), preceded by a double slash (//).
    • Dan's Web Tips: URLs 20 September 2009 5:19 UTC webtips.dan.info [Source type: FILTERED WITH BAYES]

     .http://en.wikipedia.org/ and HTTP://EN.WIKIPEDIA.ORG/ both open the same page.
  • The port number is optional; if omitted, the default for the scheme is used.^ If omitted, the default host for http is www .
    • HTML URL's 20 September 2009 5:19 UTC www.w3schools.com [Source type: Reference]
    • HTML URL's 17 January 2010 10:24 UTC en.w3schools.com [Source type: FILTERED WITH BAYES]

     ^ If : is omitted, the port defaults to 21.
    • draft-ietf-uri-url-07 - Uniform Resource Locators (URL) 17 January 2010 10:24 UTC tools.ietf.org [Source type: Reference]

     ^ If the URL scheme or the URLStreamHandler for the URL do not define a default port number, then -1 is returned.
    • URL (Java 2 Platform SE v1.4.2) 20 September 2009 5:19 UTC java.sun.com [Source type: Reference]
    • URL (Java Platform SE 6) 20 September 2009 5:19 UTC www.math.shu.edu [Source type: Reference]

     .For example, if http://myvncserver.no-ip.org:5800 is typed into the address bar of a browser it will connect to port 5800 of myvncserver.no-ip.org; this port is used by the VNC remote control program and would set up a remote control session.^ For example, the default port for http is 80 .
    • URL (Java 2 Platform SE v1.4.2) 20 September 2009 5:19 UTC java.sun.com [Source type: Reference]
    • URL (Java Platform SE 6) 20 September 2009 5:19 UTC www.math.shu.edu [Source type: Reference]

     ^ The browser connects to the proxy IP address on TCP:8080.
    • Troubleshooting HTTP 502: The Uniform Resource Locator (URL) does not use a recognized protocol 17 January 2010 10:24 UTC technet.microsoft.com [Source type: Reference]

     ^ The browser connects to the IP address on TCP:80.
    • Troubleshooting HTTP 502: The Uniform Resource Locator (URL) does not use a recognized protocol 17 January 2010 10:24 UTC technet.microsoft.com [Source type: Reference]

     .If the port number is omitted a browser will connect to port 80, the default HTTP port.
  • The path is used to find the resource specified.^ If omitted, the default host for http is www .
    • HTML URL's 20 September 2009 5:19 UTC www.w3schools.com [Source type: Reference]
    • HTML URL's 17 January 2010 10:24 UTC en.w3schools.com [Source type: FILTERED WITH BAYES]

     ^ If : is omitted, the port defaults to 21.
    • draft-ietf-uri-url-07 - Uniform Resource Locators (URL) 17 January 2010 10:24 UTC tools.ietf.org [Source type: Reference]

     ^ The port number to connect to.
    • draft-ietf-uri-url-07 - Uniform Resource Locators (URL) 17 January 2010 10:24 UTC tools.ietf.org [Source type: Reference]

     .It is case-sensitive, though it may be treated as case-insensitive by some servers, especially those based on Microsoft Windows.^ For example, there may be cases where some segments are case-insensitive.
    • United States Patent Application: 0060218143 17 January 2010 10:24 UTC appft1.uspto.gov [Source type: Reference]

     ^ The hostname portion of a URL, if present, is case insensitive (since the DNS is specified to ignore case); other parts are not required to be, but may be treated as case insensitive by some clients and servers, especially those that are based on Microsoft Windows.
    • Uniform Resource Locator 17 January 2010 10:24 UTC www.webcenters.info [Source type: Reference]

     ^ It may be treated as case insensitive by some servers, especially those that are based on Microsoft Windows .
    • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

     .If the server is case sensitive and http://en.wikipedia.org/wiki/URL is correct, http://en.wikipedia.org/WIKI/URL/ or http://en.wikipedia.org/wiki/url/ will display an HTTP 404 error page.
  • The query string contains data to be passed to web applications such as CGI programs.^ Are URLs case sensitive?
    • Dan's Web Tips: URLs 20 September 2009 5:19 UTC webtips.dan.info [Source type: FILTERED WITH BAYES]

     ^ A web server may utilize a web application for dynamic web page content.
    • Glossary - Web Application Security Consortium 17 January 2010 10:24 UTC www.webappsec.org [Source type: Reference]

     ^ HTTP selector, and is a query string.
    • draft-ietf-uri-url-07 - Uniform Resource Locators (URL) 17 January 2010 10:24 UTC tools.ietf.org [Source type: Reference]

     .The query string contains name/value pairs separated by ampersands, with names and values in each pair being separated by equal signs, for example first_name=John&last_name=Doe.
  • The anchor part when used with HTTP specifies a location on the page.^ You can specify multiple name value pairs.

     ^ The anchor is simply a pointer to that location of the page.
    • Uniform Resource Locator - Hill2dot0 17 January 2010 10:24 UTC www.hill2dot0.com [Source type: Reference]

     ^ For example, many companies will use their company name as part of the server field.
    • Mapping uniform resource locators to broadcast addresses in a television signal - Patent 6018764 17 January 2010 10:24 UTC www.freepatentsonline.com [Source type: Reference]

     .For example http://en.wikipedia.org/wiki/URL#Syntax addresses the beginning of the Syntax section of the page.^ Think of a URL as the address or location of the page.
    • Purveyor Administrator's Guide - Uniform Resource Locators 17 January 2010 10:24 UTC vms.process.com [Source type: Reference]

     ^ For example, http://en.wikipedia.orghttp://en.wikipedia.org/wiki/URL#Syntax would bring you to the beginning of the Syntax section of this page.
    • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

     ^ What does http at a beginning of a web address?
    • WikiAnswers - What does the prefix 'http' in the web page's uniform resource protocol stand for 17 January 2010 10:24 UTC wiki.answers.com [Source type: General]

Absolute vs relative URLs

.An absolute URL is one that completely specifies the desired resource starting from the root of the resource name space.^ In computing, a Uniform Resource Locator (URL) is a type of Uniform Resource Identifier (URI) that specifies where an identified resource is available and the mechanism for retrieving it.
  • Uniform Resource Locator 17 January 2010 10:24 UTC www.webcenters.info [Source type: Reference]

 ^ These URLs allow a resource such as a document, graphical image or multimedia file to be uniquely addressed by specifying the host name, directory path and file name where it is located.
  • The TCP/IP Guide - World Wide Web Addressing: HTTP Uniform Resource Locators (URLs) 17 January 2010 10:24 UTC www.tcpipguide.com [Source type: Reference]

 ^ If the new scheme does not locate resources that are data objects, the properties of names in the new space must be clearly defined.
  • draft-ietf-uri-url-07 - Uniform Resource Locators (URL) 17 January 2010 10:24 UTC tools.ietf.org [Source type: Reference]

 .It is unique, meaning that if two absolute URLs are identical, they point to the same resource.^ It is unique meaning that if two URLs are identical, they point to the same file.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

 ^ Functionally, a PURL is a URL. However, instead of pointing directly to the location of an Internet resource, a PURL points to an intermediate resolution service.
  • Cover Pages: Data Sharing, Mediation, and Synchronization 17 January 2010 10:24 UTC xml.coverpages.org [Source type: Reference]
  • Papers: Uniform Resource Identifiers: overview of developments 17 January 2010 10:24 UTC www.kbr.be [Source type: Reference]
  • Introduction to Persistent Uniform Resource Locators 17 January 2010 10:24 UTC www.isoc.org [Source type: Reference]

 ^ Two URL objects are equal if they have the same protocol, reference equivalent hosts, have the same port number on the host, and the same file and fragment of the file.
  • URL (Java Platform SE 6) 20 September 2009 5:19 UTC www.math.shu.edu [Source type: Reference]

 [9] An example is: http://en.wikipedia.org/wiki/File:Raster_to_Vector_Mechanical_Example.jpg
.A relative URL points to the location of a resource relative to a base URL.[9][10] It is preceded by two dots (../directory_path/file.txt) for the directory above, one dot (./directory_path/file.txt) for the current directory or without the beginning slash (directory_path/file.txt) which is also the current directory.^ URL, uniform resource locator .
  • URL, uniform resource locator | Internet Ad Sales 17 January 2010 10:24 UTC www.internetadsales.com [Source type: FILTERED WITH BAYES]

 ^ Test whether the resource url is a file.
  • ll.url · Python software · LivingLogic AG 20 September 2009 5:19 UTC www.livinglogic.de [Source type: Reference]

 ^ URL uniform resource locator .

 .No dots (/directory_path/file.txt) for the root directory or domain.^ Directory Traversal : A technique used to exploit web sites by accessing files and commands beyond the document root directory.
  • Glossary - Web Application Security Consortium 17 January 2010 10:24 UTC www.webappsec.org [Source type: Reference]

 ^ For instance, in http://www.simplygraphix.com/portfolio/4.html the file 4.html is located in portfolio subdirectory under the server root directory.

 ^ The rest of the URL contains information on the server's domain, the directory to the file, and the name of the file to be displayed.
  • IHS Web Site Help Center - FAQs 17 January 2010 10:24 UTC www.ihs.gov [Source type: General]

 .Which results to http://www.webreference.com/directory_path/file.txt.^ An example: http: // WWW.Stars.com /index.html The initial portion of the URL (before the two slashes) specifies the method of access.
  • WDVL: Uniform Resource Locators 17 January 2010 10:24 UTC www.wdvl.com [Source type: Reference]

 ^ Linkage: http://www.research.att.com .
  • The Government Information Locator Service 17 January 2010 10:24 UTC www.archives.gov [Source type: Reference]

 ^ Microsoft Internet Explorer : http://www.mocrosoft.com > downloads .
  • What is internet - webserver - Free Computer Science Tutorials - Provided by Laynetworks.com - Lay Networks 17 January 2010 10:24 UTC www.laynetworks.com [Source type: General]

URLs as locators

.A URL is a URI that, "in addition to identifying a resource, provides a means of locating the resource by describing its primary access mechanism (e.g., its network location)".^ String getHref () Gets the URI (Uniform Resource Identifier) of the locator.

 ^ The term "Uniform Resource Locator" (URL) refers to the subset of URIs that, in addition to identifying a resource, provide a means of locating the resource by describing its primary access mechanism (e.g., its network "location").
  • Uniform Resource Identifier (URI): Generic Syntax 17 January 2010 10:24 UTC greenbytes.de [Source type: Reference]

 ^ URLs provide a good mechanism for refering to arbitrary network resources.
  • IETF - Uniform Resource Identifiers (URI) Working Group 17 January 2010 10:24 UTC ftp.ics.uci.edu [Source type: Reference]

 [11][12]

Internet hostnames

Main article: Hostname
.On the Internet, a hostname is a domain name assigned to a host computer.^ Main article: Hostname On the Internet , a hostname is a domain name assigned to a host computer.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

 ^ All hostnames are domain names, but not all domain names are hostnames.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ On the Internet, a hostname is a domain name assigned to a host computer.
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 .This is usually a combination of the host's local name with its parent domain's name.^ This represents a more localized domain name.

 ^ This is usually a combination of the host's local name with its parent domain's name.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ Every URL consists of a domain name, a description of the document's location within the host computer, and the name of the document itself, separated by full stops and backslashes.
  • URL - Hutchinson encyclopedia article about URL 20 September 2009 5:19 UTC encyclopedia.farlex.com [Source type: FILTERED WITH BAYES]

 .For example, en.wikipedia.org consists of a local hostname (en) and the domain name wikipedia.org.^ All hostnames are domain names, but not all domain names are hostnames.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ This represents a more localized domain name.

 ^ Any domain name can also be a hostname, as long as the restrictions mentioned below are followed.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 .The hostname is translated into an IP address via the local hosts file, or the Domain Name System (DNS) resolver.^ All hostnames are domain names, but not all domain names are hostnames.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

 ^ This represents a more localized domain name.

 ^ Their job is to translate IP addresses into meaningful hostnames that are easy to remember.
  • http://docstore.mik.ua/orelly/oracle/webapp/ch02_02.htm 17 January 2010 10:24 UTC docstore.mik.ua [Source type: Reference]

 .It is possible for a single host computer to have several hostnames; but generally the operating system of the host prefers to have one hostname that the host uses for itself.^ It is possible for a single host computer to have several hostnames; but generally the operating system of the host prefers to have one hostname that the host uses for itself.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ Multi-user computer operating system.

 ^ Every URL consists of a domain name, a description of the document's location within the host computer, and the name of the document itself, separated by full stops and backslashes.
  • URL - Hutchinson encyclopedia article about URL 20 September 2009 5:19 UTC encyclopedia.farlex.com [Source type: FILTERED WITH BAYES]
.Any domain name can also be a hostname, as long as the restrictions mentioned below are followed.^ Any domain name can also be a hostname, as long as the restrictions mentioned below are followed.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ All hostnames are domain names, but not all domain names are hostnames.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ The domain name "pmtpa.wikimedia.org" is not a hostname since it does not have an IP address, but "rr.pmtpa.wikimedia.org" is a hostname.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

 .For example, both "en.wikimedia.org" and "wikimedia.org" are hostnames because they both have IP addresses assigned to them.^ So, for example, both "www.web-hosting-top.com" and "web-hosting-top.com" are hostnames because they both have IP addresses assigned to them.
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ So, for example, both "en.wikimedia.org" and "wikimedia.org" are hostnames because they both have IP addresses assigned to them.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

 ^ The domain name "pmtpa.wikimedia.org" is not a hostname since it does not have an IP address, but "rr.pmtpa.wikimedia.org" is a hostname.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

 .The domain name "pmtpa.wikimedia.org" is not a hostname since it does not have an IP address, but "rr.pmtpa.wikimedia.org" is a hostname.^ The domain name "pmtpa.wikimedia.org" is not a hostname since it does not have an IP address, but "rr.pmtpa.wikimedia.org" is a hostname.
  • Uniform Resource Locator (Linux Reviews) 17 January 2010 10:24 UTC linuxreviews.org [Source type: Reference]

 ^ Note that the resolver address is the IP address or domain name of the PURL Resolver.
  • Introduction to Persistent Uniform Resource Locators 17 January 2010 10:24 UTC www.isoc.org [Source type: Reference]

 ^ Next comes the hostname (domain name or IP address), preceded by a double slash (//).
  • Dan's Web Tips: URLs 20 September 2009 5:19 UTC webtips.dan.info [Source type: FILTERED WITH BAYES]

 .All hostnames are domain names, but not all domain names are hostnames.^ All hostnames are domain names, but not all domain names are hostnames.
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ Any domain name can also be a hostname, as long as the restrictions mentioned below are followed.
  • Uniform Resource Locator WEB HOSTING TERM.Uniform Resource Locator Hosting Glossary 17 January 2010 10:24 UTC www.web-hosting-top.com [Source type: FILTERED WITH BAYES]

 ^ A given domain can, potentially, contain millions of host names as long as they are all unique within that domain.

See also

References

  1. ^ RFC 3305 "URI Partitioning: There is some confusion in the web community over the partitioning of URI space, specifically, the relationship among the concepts of URL, URN, and URI. The confusion owes to the incompatibility between two different views of URI partitioning, which we call the 'classical' and 'contemporary' views."
  2. ^ Uniform Resource Locators (URL)
  3. ^ URL Specification
  4. ^ Berners-Lee, Tim, Frequently asked questions by the press, http://www.w3.org/People/Berners-Lee/FAQ#etc, retrieved 2010-02-03 
  5. ^ "Technology | Berners-Lee 'sorry' for slashes". BBC News. 2009-10-14. http://news.bbc.co.uk/1/hi/technology/8306631.stm. Retrieved 2010-02-14. 
  6. ^ RFC 1738
  7. ^ PHP parse_url() Function, http://us.php.net/parse_url, retrieved 2009-03-12 
  8. ^ URL Syntax
  9. ^ a b Absolute vs Relative URLs
  10. ^ "Relative URLs". WebReference.com. 1998-06-11. http://www.webreference.com/html/tutorial2/3.html. Retrieved 2010-02-14. 
  11. ^ Tim Berners-Lee, Roy T. Fielding, Larry Masinter. (January 2005). “Uniform Resource Identifier (URI): Generic Syntax”. Internet Society. RFC 3986; STD 66.
  12. ^ by describing its primary access mechanism

External links

Hypermedia
Basics
Resource identifiers
Concepts
Technology
See also

Wiktionary

Up to date as of January 14, 2010

Definition from Wiktionary, a free dictionary

English

Wikipedia-logo.png

Noun

Uniform Resource Locator (abbreviation: URL, plural: URLs)
.
  1. An universal address for resources on the internet, which is most commonly used for websites.^ (Uniform Resource Identifier) The address of an Internet resource.
    • Define meaning of URI - Uniform Resource Identifier 17 January 2010 10:24 UTC looselycoupled.com [Source type: Reference]

     ^ URL uniform resource locator universal resource locator URLs are the Internet equivalent of addresses.
    • URL - Glossary - CNET.com 17 January 2010 10:24 UTC www.cnet.com [Source type: FILTERED WITH BAYES]

     ^ This is the address of a resource on the Internet.
    • URL - Uniform Resource Locator — Bika Lab Systems 17 January 2010 10:24 UTC www.bikalabs.com [Source type: General]
    http://en.wiktionary.org/ is the URL for the English Wiktionary.

See also


Simple English

[[File:|thumb|200px|The URL makes sure it goes to the right website. It is easy to make a mistake as there are lots of websites. This picture shows the resources near Google.]] Uniform Resource Locator (URL) is another name for a web address. It is a simpler way to remember the identity of a computer on the Internet. URLs often contain www. (which stands for World Wide Web). URLs consist of several parts:

In some cases, the URL may also contain

  • The path to a document or script.
  • In the case of a script, additional parameters
  • Username and password needed to access a certain page

The URL of this page is http://simple.wikipedia.org/w/index.php?title=Uniform_Resource_Locator

  • http is the protocol
  • simple.wikipedia.org is the web site
  • /w/index.php is a script. That script gets parameters, title=Uniform_Resource_Locator

Extensions

These are at the end of the domain name which has a period mark before it. At first there were six main extensions:

Today, there are many other URL extensions. These are usually either a top level domain or interest grouping. Each country has its own top level domain, for example, .ca for Canada, .us for the United States of America or .co.uk for the United Kingdom. Many countries have a government-only extension, for example the United States uses .gov or .fed.us, .gc.ca for Canada and .gov.uk for the United Kingdom. Interest group domains would include .tv (television), .pro (professionals) and .xxx (pornography). These are not used as often as the original extensions.

Retrieved from "http://yak.rapint.com/wiki/Uniform_Resource_Locator"

Citable sentences

Up to date as of December 13, 2010

Here are sentences from other pages on Uniform Resource Locator, which are similar to those in the above article.








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