"tshad" <toms@p...> wrote in message 
news:OjA0PNgFKHA.4316@T......
> I figured out how to do this by:
>
>   <source>
>      <xsl:if test="../../FIELDS/HEADER">
>            <xsl:value-of select="../../FIELDS/HEADER"/>
>      </xsl:if>
>      <xsl:if test="../../FIELDS/*[name() = 
> concat('TITLE',current()/@NUM)]">
>             <xsl:value-of select="../../FIELDS/*[name() = 
> concat('TITLE',current()/@NUM)]"/>
>       </xsl:if>
>   </source>
>
> But what I found that when both exists, it concatenates the 2nd test with 
> the first so that I end up with:
>
>
> Subject Photo PageThis is Title1
> Subject Photo Page
> Subject Photo PageThis is Title3
>
> How do you tell it to delete what is there (in the 1st and 3rd case) and 
> put the new value there.?
>
> I could put 2 tests in the first part, but I would prefer to write out the 
> Headers text and if the 2nd test passes to overwrite what the Header test 
> put there.  So I would end up with:
>
> This is Title1
> Subject Photo Page
> This is Title3
>
> Thanks,
>
> Tom
>
> "tshad" <toms@p...> wrote in message 
> news:uZ9YNkfFKHA.1488@T......
>> How would you test if something exists?
>>
>> If you have:
>>
>>    <FORM>
>>        <FIELDS>
>>            <HEADER>Subject Photo Page</HEADER>
>>            <TITLE1>This is Title1</TITLE1>
>>            <TITLE3>This is Title3</TITLE3>
>>        </FIELDS>
>>        <FORMPHOTOS>
>>            <PHOTO NUM="1">
>>                <FILENAME>09May001.jpg</FILENAME>
>>                <FILETYPE>JPEG</FILETYPE>
>>            </PHOTO>
>>            <PHOTO NUM="2">
>>                <FILENAME>09005.jpg</FILENAME>
>>                <FILETYPE>JPEG</FILETYPE>
>>            </PHOTO>
>>            <PHOTO NUM="3">
>>                <FILENAME>09002.jpg</FILENAME>
>>                <FILETYPE>JPEG</FILETYPE>
>>            </PHOTO>
>>        </FORMPHOTOS>
>>    </FORM>
>>
>> And I want to test if a name exists:
>>
>> Something like:
>>
>> <xsl:template match="FORMPHOTOS/PHOTO">
>>  <xsl:choose>
>>   <xsl:when test=". != ''">
>>    <attachment>
>>     <source>
>>        <xsl:choose>
>>
>>         <xsl:when test="name() = concat('TITLE',current()/@NUM) 
>> exists"> <--------
>>
>>                    <xsl:value-of select="../../FIELDS/*[name() = 
>> concat('TITLE',current()/@NUM)]"/>
>>         </xsl:when>
>>         <xsl:otherwise>
>>                   <xsl:value-of select="../../FIELDS/HEADER"/>
>>         </xsl:otherwise>
>>        </xsl:choose>
>>     </source>
>>    </attachment>
>>   </xsl:when>
>>  </xsl:choose>
>> </xsl:template>
>>
>> What I want to happen here is that for the nodes that have NUM = 1 or 3 
>> to use TITLE1 and TITLE3 (since they exist), otherwise use HEADER.
>>
>> Thanks,
>>
>> Tom
>>
>
>

You could use something like this:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="xml" indent="yes"/>

    <xsl:template match="/">
        <photos>
            <xsl:apply-templates select="FORM/FORMPHOTOS/PHOTO"/>
        </photos>
    </xsl:template>

  <xsl:template match="PHOTO">
    <photo NUM="{@NUM}">
      <xsl:variable name="titleElementName" select="concat('TITLE', @NUM)" 
/>
      <xsl:choose>
        <xsl:when test="/FORM/FIELDS/*[local-name() = $titleElementName]">
          <xsl:value-of select="/FORM/FIELDS/*[local-name() = 
$titleElementName]" />
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="/FORM/FIELDS/HEADER" />
        </xsl:otherwise>
      </xsl:choose>
    </photo>
  </xsl:template>

</xsl:stylesheet>

The XML schema is poor, having elements like TITLE1, TITLE2 etc will always 
make processing difficult, better to use attributes:
<TITLE number="1" />
for example.

Regards

-- 

Joe Fawcett (MVP - XML)
http://joe.fawcett.name