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Testing Whether An Element Exists Or Has Value

From: MDW@-----------.---------.---
To: NULL
Date: 5/8/2005 11:36:00 AM

Hey all,

I'm just starting out with XML/XSL, so I apologize if this is a stupid 
question. I'm working on formatting some XML documents for display on the Web 
(I doubt there will be any other use of them for any other application). 

I'm creating several documents that will have a CreatedDate element. Also, 
if there has been a change since the doc was created, there may also be a 
LastModified element. On the Web page, I want to display something like this:

"Created: 12/23/2003
Last Modified: 04/27/2004"

but obviously, if something hasn't been modified, I don't want to display 
that second line. How, in XSL, can I test whether the LastModified element is 
there? (It also may be there, but be empty.)

Thanks.
-- 
Hmm...they have the Internet on COMPUTERS now!

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