This function can be used to test the existence of a file.   An example would be something like: «SetV('fileName',concat(Directory,'\ExtraTemplate.xdtpx'))» «If(FileExists(GetV('fileName')))» «MergeTemplate(GetV('fileName'))» «End(if exists)»   This will construct the name of a file in the XpressDox variable named ‘fileName’, and, if the file exists, issue the MergeTemplate command for it....

There are times when it is necessary to concatenate the values of data elements, variables and/or hard-coded strings together to form a value which is then stored in a variable. The concat function does this.