Ashley King

Have you built a custom tag yet? If you haven't, you're missing one of the most exciting features of ColdFusion 3.0. Custom tags are the ability to extend ColdFusion Markup Language (CFML) with custom tags. For the first time, developers could encapsulate functions, snippets of code and even entire applications in a portable, modular format. A quick browse through the over 400 custom tags in the Allaire Tag Gallery attests to their popularity and flexibility. But just when you thought it couldn't get any better, it did. In ColdFusion 4.0, enhancements in custom tag functionality enable developers to build nested custom tags. These nested tags can be associated with each other so that data is passed easily between tags. While this is a significant advance in CFML, there's more functionality than meets the eye. We'll cover this functionality, and we'll build the more)