16.5.9 Opening DocBook ancestor elements
To get a block element in the correct position in a hierarchy, you might have to force the opening of interpolated ancestor elements first; or, in some cases, specify elements that must be opened after the current element ends.
§16.5.9.1 Starting ancestor elements before the current block
§16.5.9.2 Starting a new hierarchy after the current block
> 16 Producing DocBook XML > 16.5 Nesting DocBook block elements > 16.5.9 Opening DocBook ancestor elements
