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Chapter 20. Building Reusable Components > Introducing CFML Custom Tags

Introducing CFML Custom Tags

The UDF framework introduced in Chapter 19 is brand new for ColdFusion MX and represents a major step forward, making ColdFusion application development faster than ever before. UDFs are probably the easiest and most straightforward way to extend the language.

That said, the most flexible way to extend ColdFusion is by creating your own tags. Like UDFs, custom tags enable you to add your own tags to the CFML language, for whatever purpose you want. Unlike UDFs, the custom tag framework has been around since ColdFusion 3.0, and has become a rich and mature part of the product. At the time of this writing, there are a great many more custom tags than UDFs, and custom tags are the bedrock of many existing ColdFusion applications. They excel at encapsulating concepts and processes.


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