With <filename> a name for the output file to be generated is given. If the element is not given, the software has to choose the name automatically.
A file extension need not to/must not be given, because it is determined by the output file format (see also <fileformat>):
Format file extension ------------------------- ASCII .txt (La)TeX .tex PDF .pdf Postscript .ps HTML .html DocBook .xml
<filename> must be given only once.
(see also <output>)
<!-- a very imaginative name... :-) --> <!-- the file extension MUST NOT be given --> <!-- because it is determined by the file format --> <filename>table-1</filename>