The tag <classname> must be used each time a class name is represented by itself; it should not be used when combined with a method name, variable name, or constant, and no other content is allowed within the tag.
<para>
The class <classname>Zend_Class</classname>.
</para>
Variables must be wrapped in the <varname> tag. Variables must be written using the "$" sigil. No other content is allowed within this tag, unless a class name is used, which indicates a class variable.
<para>
The variable <varname>$var</varname> and the class variable
<varname>Zend_Class::$var</varname>.
</para>
Methods must be wrapped in the <methodname> tag. Methods must either include the full method signature or at the least a pair of closing parentheses (e.g., "()"). No other content is allowed within this tag, unless a class name is used, which indicates a class method.
<para>
The method <methodname>foo()</methodname> and the class method
<methodname>Zend_Class::foo()</methodname>. A method with a full signature:
<methodname>foo($bar, $baz)</methodname>
</para>
Use the <constant> tag when denoting constants. Constants must be written in UPPERCASE. No other content is allowed within this tag, unless a class name is used, which indicates a class constant.
<para>
The constant <constant>FOO</constant> and the class constant
<constant>Zend_Class::FOO</constant>.
</para>
Filenames and paths must be wrapped in the <filename> tag. No other content is allowed in this tag.
<para>
The filename <filename>application/Bootstrap.php</filename>.
</para>
Commands, shell scripts, and program calls must be wrapped in the <command> tag. If the command includes arguments, these should also be included within the tag.
<para>
Execute <command>zf.sh create project</command>.
</para>