- file: index
  title: Toc
- part: Chapter 1
  numbered: true
  chapters:
  - file: content1
    title: Content1
- part: Chapter 2
  chapters:
  - file: content2
    title: Content2
  - file: content3
    title: Content3
- part: Chapter 3
  numbered: true
  chapters:
  - file: subfolder/index
    title: Subfolder
    sections:
    - file: subfolder/asubpage
      title: Asubpage
