XWT
Using Leo for reST
Water!
XML editing with XML schema
What is XSLT?
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Cambridge Docs: “XML has become a buzzword that’s so over-used that it’s difficult to understand when it might and when it might not be appropriate. In general, the main reason for XML’s popularity is that it provides an underlying technology that gives "portability" of information across platforms, applications, and organizations.”
Why Create/Convert Documents to XML?
It is not a technical document, but something that is aimed at IT managers. It might come in handy.
Personal opinion, repeating nth time: I still believe it is horrible to type in angle-bracket-focused content using plain text editors. It hurts!