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Indentation

Indentation should consist of 4 spaces. Tabs are not allowed.

Tags which are at the same level must have the same indentation.

<sect1>
</sect1>

<sect1>
</sect1>

Tags which are one level under the previous tag must be indented with 4 additional spaces.

<sect1>
    <sect2>
    </sect2>
</sect1>

Multiple block tags within the same line are not allowed; multiple inline tags are allowed, however.

<!-- NOT ALLOWED: -->
<sect1><sect2>
</sect2></sect1>

<!-- ALLOWED -->
<para>
    <classname>Zend_Magic</classname> does not exist. <classname>Zend_Acl</classname> does.
</para>

Zend Framework