A page is a container for user-defined content, including text, lists, tables, page titles, images, and note tags. Most types of content are entered and contained in an outline object that is contained in a page. However, some types of content can be entered directly onto a page.
Pages can be organized in a hierarchical system with different levels of subpages. All pages are referenced through a page series, where the first page in a page series is the top-level page, and all subsequent pages in a page series are subpages of the top-level page.
For more information about pages, see section 2.2.13.