if [ -z "$CLASSPATH" ]; then
   export CLASSPATH=.:/home/group/xmltools/parsers/xerces/xerces.jar:/home/group/xmltools/formatters/xalan/xalan.jar
else
   export CLASSPATH=.:/home/group/xmltools/parsers/xerces/xerces.jar:/home/group/xmltools/formatters/xalan/xalan.jar:$CLASSPATH
fi