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DocBook seems to be nice, but is there a Tool that helps using it? I mean something that would instantly show how it looks or allows editing more easily by selecting a word and then hitting a button to format it somehow, or to enter a paragraph, a index, a footnote, whatever.
This is super-barebones. For a more feature-rich editor with these features, there isn't a free alternative available. The most popular paid programs for visually editing Docbook are oXygen and XMetal. – Scribblemacher – 2015-10-02T18:06:30.727