http://blogs.msdn.com/b/neerajag/archive/2005/08/12/450723.aspxI was trying to validate a xml file using xsd wherein a node value should be non-empty. Means there should be atleast one non-whitespace character into that. After lots of googling, I finally wrote up a small pattern to validate that. Here is the fragmentenTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/neerajag/archive/2005/08/12/450723.aspx#9831312Mon, 13 Jul 2009 12:11:26 GMT91d46819-8472-40ad-a661-2c78acb4018c:9831312valdating a element such that, it must contain a child elemet<p>Consider a element :</p> <p>&lt;A&gt;</p> <p> &nbsp;&lt;B/&gt;</p> <p> &nbsp;&lt;C/&gt;</p> <p>&lt;/A&gt;</p> <p>A either contain B or C or both. The only invalid condition is empty A.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9831312" width="1" height="1">http://blogs.msdn.com/b/neerajag/archive/2005/08/12/450723.aspx#9632084Wed, 20 May 2009 14:32:39 GMT91d46819-8472-40ad-a661-2c78acb4018c:9632084Aharon Levine<p>Thanks,</p> <p>Just what I needed!</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9632084" width="1" height="1">