How to use xsl:when

[Manish Hatwalne]

How can I use xsl:choose, xsl:when and xsl therwise? This is what I am trying to do - I have an element -

<person gender="male">
   <name>Manish</name>
   blah blah...
</person>
[B] The DTD part[/B]
<!ATTLIST person gender (male|female) "female">

I have an XSL which displays this in a table, which is working fine. Now I want to show all males in one color and females in another. How can I speify condition for this in xsl:when. I tried sth, but it displayed all in one color.
Also, in DTD I have specified default value for gender as "female", so not all <person> elements will have gender attribute in them.
Can somebody help?
TIA,
- Manish

[Rick Salsa]

Hi Manish,
Give this a try:

<xsl:variable name="gender">male</xsl:variable> 
<!-- Here would be your loop to go through each person -->
<xsl:choose>
  <xsl:when test="$gender = person/@gender">
   <!--xhtml code to display male in one color-->
  </xsl:when>
  <xsl:otherwise>
   <!--xhtml code to display female in one color-->
  </xsl:otherwise>
</xsl:choose>
<!-- End of loop -->

I believe that should be the trick.
HTH,
/rick
Darn smilies...... :P
[ May 21, 2002: Message edited by: Rick Salsa ]

[Manish Hatwalne]

Thanks Rick! I'll give it a try.
Also, this is what I tried without using the xsl variable; but didn't work out. Can somebody point out what am I missing? I want to get this working...

<xsl:choose>  
   <xsl:when test="//[person/@gender=female]">
       <!-- sth here -->
   </xsl:when>  
   <xsl:otherwise>
       <!-- sth here -->
   </xsl:otherwise>
</xsl:choose>

I have just started experimenting with XML, and not very comfortable with XPATH expressions, where can I find more information abt it?
TIA,
- Manish

[Manish Hatwalne]

Well, it's working; finally.
The xml:when test should have been -> test=".[person/@gender='female']" , however the previous test that I mentioned is always returning true. I wonder why? Can someone explain?
TIA,
- Manish

[Ingo Schildmann]

 
   <xsl:when test="//[person/@gender=female]">

Your test translates to:
Is there any element in the tree that has a child element named 'person' that has an attribute named 'gender' with value 'female' ?
Which is true of course as long as there aren't
just males.
With // you are selecting all elements in tree.
This nodeset is then filtered with the predicate [person/@gender=female] which is evaluated relative to any node of the nodeset.
The filtered nodeset is then evaluated as boolean
for the test, which means the test is only false
when the nodeset is empty.