Checking for empty values

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Subject: Checking for empty values
From: Madhu Menon <madhu@xxxxxxxxxxxxxxx>
Date: Mon, 17 Jul 2000 15:51:42 +0530

Hello.

Forgive me for asking newbie questions, but it's only because I'm a newbie :)

I want to have my XSL stylesheet evaluate to see if a tag exists or the value is blank. How do I do this using <xsl:if> or <xsl:when> ?

For example, take the following schema:

<library>

<book>
	<name>Hound of the Baskervilles</name>
	<author>Sir Arthur Conan Doyle</author>
</book>


<book>
	<name>A Dying man's prayer</name>
</book>


<book>	
	<name>XSLT Programmer's Reference</name>
	<author>Michael Kay</author>
</book>

</library>

In the second record, the <author> data is not available. I want to check for this (or the tags being empty) and then conditionally produce the output. What would be the best way to do this?

Thanks for your help.

Madhu

XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list

Current Thread
Checking for empty values Madhu Menon - Mon, 17 Jul 2000 15:51:42 +0530 <= <Possible follow-ups> Kay Michael - Mon, 17 Jul 2000 13:05:24 +0100 Juergen Hermann - Mon, 17 Jul 2000 16:25:17 +0200 David Carlisle - Mon, 17 Jul 2000 15:46:19 GMT Steve Hankin - Mon, 17 Jul 2000 16:14:49 +0100

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Re: Unparsed entities and public id, Paul Grosso	Thread	RE: Checking for empty values, Kay Michael
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