OSEO Parallel Text
For OSEO parallel text content to work correctly, there needs to be a numbering system to lock the versions of the text together.
This locking is achieved using an altNum attribute (not normally in the captured XML, but generated in a post-processing step) in milestone elements of the type unit="line" or unit="clause-start".
Where both versions of the parallel text content have milestone elements with matching attributes, the locking process functions without problems, but there are types of parallel content that need the manual addition of a milestone element or the altNum attribute.