<?xml version="1.0"?>   <!DOCTYPE rss PUBLIC "-//Netscape Communications//DTD RSS 0.91//EN"     "http://my.netscape.com/publish/formats/rss-0.91.dtd">   <rss version="0.91"><channel>     <title>Fresh Air</title>     <description>Terry Gross&#39;s interview show on National Public Radio</description>     <link>http://freshair.npr.org/dayFA.cfm?todayDate=current</link>     <language>en-US</language>     <item>         <title>John Lasseter</title>         <link>http://www.npr.org/ramfiles/fa/20020920.fa.01.ram</link>     </item>     <item>         <title>Singer and guitarist Jon Langford</title>         <link>http://www.npr.org/ramfiles/fa/20020920.fa.02.ram</link>     </item>     <item>         <title>Film critic David Edelstein</title>         <link>http://www.npr.org/ramfiles/fa/20020920.fa.03.ram</link>     </item>   </channel></rss>

Figure 3: File produced by the Fresh Air HTML scanner, using the xml_escape routine.