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
>