XML to XML XSLT Transform when Attribute does not exist

[coenen]

I am trying to do a XSLT transform from one XML format to another...so far everything is going very smooth except I am having some problems when I am doing concatination involving attributes. The problem is if say I am concatinating 3 attributes from one format into one value to be put in the new format, if any of the 3 attributes (all optional) are not included in the source xml file the entire concatination fails.

Is there a way around this? Even if one or more of the attributes do not exist in the source doc I still want it to concactinate what it can and just put nothing in the space where the missing attribute would be.

I'll try to make a simple example of files and guts of my concat.

Source
<Person Firstname="John" MiddleName="Jacob" LastName="JengleHiemerSchmitt"/>
<Person Firstname="Mary" LastName="Smith"/>

Target
<PersonFullName></PersonFullname>

XSLT concat
<PERSON>
<xsl:variable name="concatResult" select="concat('My Name is', $FirstName)"/>
<xsl:variable name="concatResult1" select="concat($concatResult, $MiddleName)"/>
<xsl:variable name="concatResult2" select="concat($concatResult1, $LastName)"/>
<xsl:value-of select="$concatResult2"/>
</PERSON>


For the first pperson it would work fine, but in the second person it would just give me nothing.

What am I doing wrong here?

 

[JontyMC]

Post your complete files, would be easier to work out what you doing wrong.

From what you got here, why not try:

<xsl:for-each select="Person">
  <PersonFullName>
    <xsl:value-of select="concat('My Name is ', @FirstName, ' ', @MiddleName, ' ', @LastName)"/>
  </PersonFullName>
</xsl:for-each>

Jon