PHP中的示例使用programlisting标记,如下所示：
<programlisting language="php"><![CDATA[<?php // Here goes the PHP code ]]></programlisting>
请注意语言属性.
稍后由另一个工具使用它来添加语法着色,在生成输出时(对于HTML输出,至少)
对于不是特定于一种编程语言的示例,例如配置文件,我们使用screen标记;例如,对于Apache相关配置文件的一部分,一个例子是：
<screen><![CDATA[# Setup Listening Port
NameVirtualHost *:80
# Ensure "localhost" is preserved unchanged pointed
# to the default document root for our system.
<VirtualHost *:80>
ServerName localhost
DocumentRoot /var/www
</VirtualHost>]]></screen>
引用他们的文件：
A programlisting is a verbatim
environment for program source or
source fragment listings. The
programlistings are often placed in
examples or figures so that they can
be cross-referenced from the text.
而且：
A screen is a verbatim environment for
displaying text that the user might
see on a computer terminal. It is
often used to display the results of a
command.Having less specific semantic
overtones,screen is often used
wherever a verbatim presentation is
desired,but the semantic of
programlisting is inappropriate.
所以,这两个看起来很合适.
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