By default, DITA2Go uses the built-in DocBook version 4.5 content model. To specify a different DocBook content model:
[DocBookOptions]
; ContentModel = name of content-model .ini, without extension,
; with which to replace the built-in DocBook 4.5 content model.
ContentModel = docbook45
If you specify a different content model, you must generate a configuration file for that model from the DTD. See §41. Working with content models.
[DocBookOptions]
; DocBookRoot = element to use at the XMLRoot.
DocBookRoot = book
Content models for both <article> and <book> are built in. You can use others, such as <set>, by replacing the content model and specifying the root name here. See §41.2.2 Generating a content model from a DTD.