| ------- | -------- |
| title | Sets the title for the content that follows |
| menu_title | Sets the title for the content that follows which will appear in the menu link sidebar. If this is not specified, it defaults to the value of the `title` keyword |
-| part | Sets the hierarchy for the content that follows. It must be one of the following (listed in order of lowering hierarchy): part, chapter, subchapter |
+| part | Sets the hierarchy for the content that follows. It must be one of the following (listed in order of lowering hierarchy): part, chapter, subchapter, section, subsection |
| link | Sets the unbreakable link to the content that follows. Links in the *content* should be prefixed with a double at-sign (@@) to tell the build system that the link is an internal one |
| include | Tells the build system that the content lives in an external file; these normally live in the `include/` directory. Note that the filename should **not** be prefixed with `include/` |
| exclude | Tells the `implode` and `explode` scripts that file referred to by the `include` keyword should be ignored. Note that the value of this keyword is ignored |