Documentation

<hd>

The <hd> element defines the title of page, chapter, part etc. Not to be confused with title.

Name	Explanation	Required
`level`	Defines how deep the header is nested in the content. Only use for headings that follow a new section. The level must be equal to the level of the section. For floating headings, do not use this level attribute. See Sectioning.	No
`number`	Defines the number of the part, chapter or subchapter.	No
`label`	Defines the semantic type of a heading when the text itself does not include an explicit heading term. In such cases, add a `label` attribute with the appropriate value (e.g., `label="chapter"`) to the `<hd>` element. Possible values include: `part` `chapter` `subChapter` If the text already contains an explicit heading term (such as “Chapter”, “Hoofdstuk”, “Kapittel”, etc.), do not use the `label` attribute.	No

<section level="2" role="subChapter">
<hd level="2">Introductie</hd>

<frame>..</frame>
<hd>Voorkennis</hd>

<section level="1" role="chapter">
<hd level="1" number="3">Basis 3 De Verlichting</hd>

<section level="1" role="chapter">
  <pagebreak id="page-78">78</pagebreak>
  <hd level="1" number="2" label="chapter">2 Organen en cellen</hd>