Levelize ensure page level increments are consistent after a page is inserted or removed.

Numberize calculates numbers for pages, e.g.

Sequenize will re-generate page sequence numbers for a document.

BulkRequest details page, it's meta, pending page changes.

LevelRequest details a page ID and level.

Meta holds raw page data that is used to render the actual page data.

NewPage contains the page and associated meta.

Page represents a section within a document.

PendingPage details page that is yet to be published.

Revision holds the previous version of a Page.

SequenceRequest details a page ID and its sequence within the document.