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RE: Problem with XPath in my XSL

2006-01-23 08:03:49
When a variable is declared like this:

<xsl:variable name="raum" select="raum"></xsl:variable>

and there is no child::raum element, the value of $raum is an empty
node-set.

$raum != ""

tests whether any of the nodes in $raum is not equal to "". There aren't any
such nodes, so the result is false.

You want

not($raum = "")

Alternatively, make your variable a string by writing it as

<xsl:variable name="raum" select="string(raum)"/>

An empty node-set will then be converted to an empty string.

Michael Kay

 

-----Original Message-----
From: Christian Barth [mailto:christian(_at_)buerobarth(_dot_)de] 
Sent: 23 January 2006 14:49
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Problem with XPath in my XSL

Hi!
 
I use the XPath-Operator "and" to test some variables in a 
xsl:choose. See
the code:
 
<xsl:template match="ergebnis">
  <xsl:for-each select="objekt">
    <xsl:variable name="bau" select="bauvorhaben"></xsl:variable>
    <xsl:variable name="geb" select="gebaeude"></xsl:variable>
    <xsl:variable name="stock" select="stockwerk"></xsl:variable>
    <xsl:variable name="NZ" select="nutzungszone"></xsl:variable>
    <xsl:variable name="raum" select="raum"></xsl:variable>
    <tr>
      <td align="center"><b><xsl:value-of select='@id'/></b></td>
      <xsl:choose>
      <!-- A-SUCHE -->
      <xsl:when test="$typ = 'A'">
        <xsl:choose>
        <!-- Für Elemente, die auf Gebaeude-Ebene liegen -->
          <xsl:when test="$geb != '' and $stock = '' and $NZ = '' and
$raum = ''">
          <td>Gebaeude "<xsl:value-of select="$geb" />" in Bauvorhaben
"<xsl:value-of select="$bau" />"<p></p>
              Elemente könnten für Sie von Interesse sein:<br></br>
              <xsl:for-each select="*">
              <xsl:choose>
                <xsl:when test="local-name() = 'gebTrennwaende'">
                  <xsl:call-template name="Datenanzeige">
                    <xsl:with-param name="element" 
select="gebTrennwand"
/>
                  </xsl:call-template>
                </xsl:when>
              </xsl:choose>
          </xsl:for-each> 
        </td>
      </xsl:when>
      <!-- Für Elemente, die auf Stockwerk-Ebene liegen -->
-------------------------------------------------------------------
<!-- THIS TEST SHOULD BE TRUE --><xsl:when test="$stock != '' 
and $NZ = ''
and $raum = ''">
-------------------------------------------------------------------
        <td>Stockwerk "<xsl:value-of select="$stock" />" von Gebaeude
"<xsl:value-of select="gebaeude" />" in Bauvorhaben "<xsl:value-of
select="bauvorhaben" />"<p></p>
          Elemente könnten für Sie von Interesse sein:<br></br>
          <xsl:for-each select="*">
            <xsl:choose>
                <xsl:when test="local-name() = 'rettungswege'">
                  <xsl:call-template name="Datenanzeige">
                      <xsl:with-param name="element" select="rw" />
                  </xsl:call-template>
                </xsl:when>
                <xsl:when test="local-name() = 'trennwaende'">
                  <xsl:call-template name="Datenanzeige">
                      <xsl:with-param name="element" 
select="trennwand" />
                  </xsl:call-template>
                </xsl:when>
            </xsl:choose>
          </xsl:for-each> 
        </td>
      </xsl:when>
      <xsl:otherwise>
        <td>Gebaeude "<xsl:value-of select="$geb" />" in Bauvorhaben
"<xsl:value-of select="$bau" />"</td>
      </xsl:otherwise>
   </xsl:choose>
   <td align="center"><b><xsl:value-of select="gesamtSim" /></b></td>
 </xsl:when>
 <!-- B-SUCHE -->
 <xsl:when test="$typ = 'B'">
   <td><xsl:value-of select="@typ" /> "<xsl:value-of 
select="bezeichnung"
/>" aus Bauvorhaben "<xsl:value-of select="bauvorhaben" />" 
in Gebaeude
"<xsl:value-of select="gebaeude" />"</td>
   <td align="center"><b><xsl:value-of select="gesamtSim" /></b></td>
 </xsl:when>
 <!-- C-SUCHE -->
 <xsl:when test="$typ = 'C'">
   noch
 </xsl:when>
 <xsl:otherwise>
   noch
 </xsl:otherwise>
</xsl:choose>
</tr> 
</xsl:for-each>
</xsl:template>



In the XML-doc used for testing this stuff, there are only the Tags
<gebaeude> and <stockwerk>. So the other variables are empty. The
xsl-processor should than enter the bold "when-clause". But 
it always goes
to the otherwise-Tag.

I just don't see why? Can anybody help me please?

Thanks,
Barthi 


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