Really Simple Syndication (RSS) Programming Question:

If your Atom feed file fails the w3.org validator, you will get an error message explaining where the error is in your feed file. The tutorial exercise below shows you a good example.

Try to validate the following Atom feed file:

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>Webmaster GlobalGuideLine</title>
<subtitle>A place to find information for Webmasters
</subtitle>
<link href="http://GlobalGuideLine.com/atom.xml"/>
<id>http://GlobalGuideLine.com/</id>
<updated>2005-07-13T18:30:02Z</updated>
<author>
<name>GlobalGuideLine.com</name>
<email>noreply@GlobalGuideLine.com</email>
</author>
<entry>
<title>Webmaster FAQ Collection</title>
<link href="http://GlobalGuideLine.com/faq/"/>
<id>http://GlobalGuideLine.com/faq/</id>
<updated>2005-07-13T18:30:02Z</updated>
<summary>A massive collection of FAQs for Webmasters.
</summary>
</entry>
</feed>

You will get the following error message:

line 2, column 3: Missing atom:link with rel="self"

<feed xmlns="http://w