Technically, plain text can be resorted to your heart's content. You don't need ReST for that. But in practice if you're writing a serious technical book and yo

Technically, plain text can be resorted to your heart's content. You don't need ReST for that. But in practice if you're writing a serious technical book and you need a serious markup language, you will likely end up with DocBook XML for its flexibility and large range of outputs.