inactive_tags: marginfig, margintable
toc: all headings expanded
label_fmts:
  heading: "@label.tree_number "
  heading_part: "Part @label.part_number "
  heading_chapter: "Chapter @label.chapter_number "
  ref_heading: "@label.title"
  ref_heading_part: "Part @label.part_number"
  ref_heading_chapter: "Chapter @label.chapter_number"