I used to use XML did Beej's Guides. I had some custom Python code that would convert it to XHTML or Formatting Objects, both XML formats. It was still kind of

I used to use XML did Beej's Guides. I had some custom Python code that would convert it to XHTML or Formatting Objects, both XML formats. It was still kind of verbose, but effective. Eventually switched to Markdown+Pandoc+more custom scripts. Formatting Objects and Apache FOP seemed to be on the back burner anyway. I like XML for markup in theory, and the formality is nice, but, damn, is Markdown nicer in practice for documents.