I recently tested a pair of XML tools that I would classify as the two best XML development environments on the market today: DataDirect technologies Stylus Studio 2007 XML Enterprise Suite and Altova XMLSpy 2007 Enterprise Edition. Overall, both of these tools are excellent products, and I intend to keep both packages available on my machine. Yes, I installed them on the same machine and they coexist peacefully. However, although both tools are excellent XML editors, they each have unique characteristics and show the influence of their original target audience. If your job involves constant XML work, you might find benefits to having both.

In ...