Sometimes in OxChapML documents, chapters may be merged, split or grouped. Merged chapters are multiple chapters that have become a single chapter. Split chapters contain sub-chapters, grouped chapters are presented together.
Merged chapters are chapters which have merged to become a single chapter.
Split chapters have chapter-like features, such as introductions, chapter summaries, and bibliographies but contain sub-chapters with distinct chapter features of their own. Grouped chapters are presented together because of the close relationship of their content with chapter-like features at the level of the grouping.