Week Six | Part Two

Images and the Uniform Resource Indicator

The Uniform Resource Indicator (URI) provides the browser with the address of a particular file.

In the same way the post office uses "Mr. John Smith, ABC Avenue, Little Town, Arizona 12345 USA" to deliver a letter, the URI provides the browser with the location of a file so it will be displayed on a Web page.

You are probably familiar with the term URL. This stands for Universal Resource Locator.

Most people call this a Web site's address. For example: http://www.bigplum.com.

The URL is actually a subset of the URI because a URL provides the address of a Web site, while a URI provides the address of all the assets on that Web site.

Assets include .htm pages, image files, scripts, cascading style sheets, media files, databases, and so on.

According to http://en.wikipedia.org/wiki/Uniform_Resource_Identifier: "In computing, a Uniform Resource Identifier (URI) consists of a string of characters used to identify or name a resource on the Internet. Such identification enables interaction with representations of the resource over a network (typically the World Wide Web) using specific protocols. Schemes specifying a specific syntax and associated protocols define each URI."

Now, let's look at the code that puts an image on a Web page.

Please go to Week Six Part 3 ».