• The DocBook RELAX NG schema satisfies the redesign goals to a large extent: it looks and feels like DocBook while at the same time having simpler, more logical content models and better contraints.

  • The RELAX NG grammar is demonstrably easier to customize, at least for those applications that can use the RELAX NG grammar directly.

  • DocBook NG has only 356 elements and 1,701 patterns.