To open interpolated ancestor elements before starting the current block:
[DITAOpenBefore] ; Frame para format = elements to be opened, with any other elements ; nested under them, before the current block element starts. somefmt = someancestor
Use this setting to force opening of elements when [DITAParents] does not suffice.
For individual cases, you can insert a DITAOpenBefore PI marker in the paragraph for the current block element instead, with content the name(s) of the element(s) to open. You can also use a DITAOpenBefore PI marker to override a [DITAOpenBefore] setting when you want to open a higher (or lower) ancestor than the setting specifies.