<para>

This book uses the following typographical conventions to mark

certain portions of text: new terms, foreign phrases, and other

important passages are emphasized in <emphasis>italics</>.

Everything that represents input or output of the computer, in

particular commands, program code, and screen output, is shown in a

monospaced font (<literal>example</literal>). Within such

passages, italics (<replaceable>example</replaceable>) indicate

placeholders; you must insert an actual value instead of the placeholder.

On occasion, parts of program code are emphasized in bold face

(<emphasis role="bold"><literal>example</></>), if they have been

added or changed since the preceding example.

</para>