how do you determine if a property exists?

Hi,

I have the following code in a template I am working
on:

<xsl:choose>
  <xsl:when test="@Predecessors=''">1</xsl:when>
  <xsl:otherwise><xsl:value-of
select="@Predecessors"/>
</xsl:otherwise>
                                </xsl:choose>



        
                
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