Learn all about XML, the eXtensible Markup Language!

  • XML

  • Parsing Atom Feeds using XPath

    The Atom Syndication format is built on the XML standard so that it may be displayed directly in modern browsers or parsed by scripts and software. Rob Gravelle explains how to apply the xpath XML extraction language to Atom feeds using PHP in order to target specific content.

  • Handling Errors when Processing WP_Ajax_Response XML Data

    In this follow-up to Serve Up XML Using WP_Ajax_Response, Rob Gravelle show how to adeptly handle errors using the WP_Ajax_Response's counterpart, the WP_Error object.

  • Serve Up XML Using WP_Ajax_Response

    WordPress's WP_Ajax_Response class is your best bet for easy Ajax coding. It takes an Array object and converts it into XML-formatted text, ready to be parsed back on the client-side. As explained by Rob Gravelle, even that part is partially taken care of by WP for you.

  • Displaying XML Files Using CSS

    If you’ve ever tried to open an XML file and expected to view it like a typical HTML file, chances are you were disappointed with the results. In this tutorial we'll discuss displaying an XML file using CSS, XSLT, JavaScript and other potential methods.

  • Web Developer Class: Creative Uses for RSS Feeds

    Most web developers are aware of RSS feeds, but may have not been able to find a way to actually use them. This tutorial will show you some creative uses for RSS feeds, and tell you how you can use them on your website.

  • The Anatomy of an RSS Feed

    RSS has become the standard data format for communicating sydicated information to a large audience. RSS is an XML format that consists of designated elements that conform to the XML 1.0 specification. This week we look at the elements in this structure.

  • How to Create RSS feeds with Dreamweaver

    RSS, or Really Simple Syndication, is commonly used for distributing headlines on news websites. The challenge in using it is to integrate your content into the feed you are creating. Enter RSS Dreamfeeder, an application that allows you to reformat your content into an RSS feed within Dreamweaver.

  • Creating a Custom RSS Feed with PHP and MySQL

    RSS has become the standard technology for syndicating information to large audiences. Many people have something to say, but finding the right audience for your voice is what matters. In this article you'll learn how to syndicate your own custom RSS feeds using PHP and MySQL.

  • Following the XHTML Path

    Guest author David Jenkins provides a quick preview and introduction to XHTML basics and its advantages.

  • HTML or XHTML? Fact From Fiction

    On an almost daily basis I see the same question asked: Should I be using HTML or XHTML? Read on to find out the truth about XHTML!

  • HTML Goodies: XHTML

    On January 26, 2000, the W3C released specifications defining what they termed XHTML 1.0 (Extensible Hypertext Markup Language). Read this article for the scoop on XHTML and what it's all about.

  • So, You Want A Custom Tag, Huh?

    Reader want to know what can be done with XML. Until now, I didn't have a really good answer, but I think I've found a pretty good use for it.

  • So, You Want A Custom Tag, Huh?


  • VML: Vector Markup Language


  • What is XML?


  • XHTML - An Introduction

    Perhaps you've heard of XHTML & wondered what it's all about. Read on!

  • XHTML Syntax

    If you're already familiar with HTML and would like to write XHTML, then this is for you!

  • XML Tutorials

    So, You Want Text Commands, Huh?

  • Converting XML to HTML using XSL

    If you've already read our introduction to XML, "Why XML?", then you're familiar with the concepts of XML tags and document structure. Here we go one step further, with a practical guide to XSL - the most common method of converting XML files to HTML. This article is an exerpt from my book "XML by Example" (see side panel for more details).

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