XSLT as Pretty Printer (XML.com)
Recently I was wading through some hard-to-read XML files. Art & Logic, the company I work for, was helping a client to build an Ajax-style Web interface that used XML to talk to the backend and client-side XSLT to produce the HTML. I found myself reformatting the XML by hand to make things easier and finally wondering as I hit the spacebar yet again: couldn't an XSLT style sheet do this formatting for me? I had done something similar before, so I decided to try writing that style sheet, using a test-driven approach. Some hours later I had a handy utility, and a new appreciation for some of the wrinkles of XML. Here's a cleaned-up account of what I did."