RE: How to check for absence of a node?

Hi Sudhir,

maybe this can help you on the way (other forummembers had to help me with the param-stuff):

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format">
	
	<xsl:template match="format">
	
		<xsl:apply-templates select="tr">
			<xsl:with-param name="thCount" select="count(/format/tr/th)"/>
		</xsl:apply-templates>
	
	</xsl:template>

	<xsl:template match="tr">
		
		<xsl:param name="thCount"/>
		
		<xsl:if test="td">
			<xsl:variable name="tdCount" select="count(td)"/>

			<xsl:if test="not($thCount=$tdCount)">
				<p>
					<xsl:text>Error: number of th and td not equal</xsl:text>
				</p>
			</xsl:if>
		
			<xsl:if test="td[text()='NA']">
				<p>
					<xsl:text>Error: one or more td contain 'NA'</xsl:text>
				</p>
			</xsl:if>

		</xsl:if>
	</xsl:template>

</xsl:stylesheet>


Greetings Rene
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      \__/

"You don't need eyes to see, you need vision!"

-----Oorspronkelijk bericht-----
Van:	Sudhir Malhotra [SMTP:sudhirmalhotra123@xxxxxxxxxxx]
Verzonden:	vrijdag 15 juni 2001 8:30
Aan:	xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Onderwerp:	 How to check for absence of a node?

I need help in testing my input XML for "NA" or empty response as shown.  
Please refer to the following code.

I would like to call error-template in case

A. I don't find the node "format/tr[2]/td[position()>1]", or
B. The value of format/tr[2]/td[position()>1] is "NA"

Any input will be greatly appreciated.

Thanks.

-sm

-- XML input ---
      <format>
	<tr>
	  <th>th1</th>
	  <th>th2</th>
	  <th>th3</th>
	  <th>th4</th>
	  <th>th5</th>
	  <th>th6</th>
	  <th>th7</th>
	  <th>th8</th>
	</tr>
	<tr>
	  <td>timestamp1</td>
	  <td>NA</td>
	  <td>NA</td>
	  <td>NA</td>
	  <td>NA</td>
	  <td>NA</td>
	  <td>NA</td>
	  <td>NA</td>
	</tr>
       </format>
---------------
-- XSL code ---
<xsl:template match="/">

<!-- if error tag is present, process that -->
<xsl:apply-templates select="//error"/>

<!-- else if
A. I don't find the node "format/tr[2]/td[position()>1]", or
B. The value of all td's in format/tr[2]/td[position()>1] is "NA"
call error-template -->
Don't know how to code the above conditions A and B.

<!-- else,  the input XML looks good, start processing it -->
<xsl:apply-templates select="format"/>

</xsl:template>


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