Comments are a useful way to leave messages for other users of an XML document without affecting the way the XML document is processed.
When you open an XML file, the information structure displays using the default settings of the web browser. Internet Explorer 6 contains version 3 of the MSXML Parser. xml file as it appears when opened in Internet Explorer earlier in the chapter. Figure 2-6 shows the same file open in Firefox. 40 INTRODUCTION TO XML Figure 2-6. An XML file open in Firefox You can download tools for Internet Explorer that will allow you to validate an XML file against an embedded schema. aspx for the relevant files.