Linuxdoc Reference: Sectioning

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## 6. Sectioning

    <!element chapt - o (%sect, sect*) +(footnote)>
    <!element sect  - o (%sect, sect1*) +(footnote)>
    <!element sect1 - o (%sect, sect2*)>
    <!element sect2 - o (%sect, sect3*)>
    <!element sect3 - o (%sect, sect4*)>
    <!element sect4 - o (%sect)>

The sectioning

> Also the `chapt` tag is a sectioning tag.

is done by the according elements, forming the section tree. They are bringing the various paragraphs within our document to follow a nice tree. The top level tag and the allowed depth is varying with the document class (see section The Document Class).

The normal hierarchy is

    chapt
        sect
            sect1
                sect2
                    sect3
                        sect4

Just take a book, look the table of conetents and you will see.

Each of the tags out of the sectionings has nearly the same syntax. All of them owe a heading. The `heading` tag is placed implicitly if you don't note it down. Also the each of the sectioning tags may contain a `header` tag, changing the current document header (see section The Header Tag).

Within the you may place subordinate sections and paragraphs (see Paragraphs).

Some of the sectioning tags may only appear in special document classes ( Document Classes).

Hint:

  It's wise to place a label tag after the text of the section tag, even if you don't want to refer to the section Labels and references. Later when your document grows you might want to.

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