Uniform Resource Locator
The World Wide Web uses Uniform Resource Locators (or URLs) to specify files on other servers. The Web technology integrates the many wide and varied data management tools available on the Internet. Data management tools are used to store information in a hierarchical structure and each has its own viewing or access tool. For example, Gopher, WAIS and news systems.
Text that has a URL link associated with it must be marked in the following way:
|<a href="URL">||This must be typed at the beginning of the link text. Note: there is a space after the a. The "URL" takes different forms depending upon the serving software on the host system.|
|</a>||Is typed after the URL link text.|
The URL includes the address of the host system, the type of resource being accessed and the location of the file on the host system. A URL has the following general form:
where scheme is one of the following:
|file||a file on a local system or stored on an anonymous FTP server.|
|http||a file stored on a Web server.|
|gopher||the source file is stored on a Gopher server.|
|WAIS||the file is stored on a WAIS server.|
|news||access a Usenet news group.|
|telnet||a connection to a Telnet-based service.|
A reference to a URL takes the following form:
<a href="http://www.bbc.co.uk/">This is a reference to the BBC's WWW server</a>
Note: no file name has been specified - when no filename is given the system will use a local file called index.html
The above would appear highlighted in the following way when viewed by your browser:
To follow the link, click on any part of the highlighted text. Use your browser's Back button to return to this calling point.
URLs are the most powerful feature of HTML. With a simple editor and an Internet connection you can reference the vast wealth of resource materials available over the Internet.