EXPORT_FILE_NAMEproperty, that name will be used for the export.
Note that, in order to produce PDF output based on an exported DocBook file,
you need to have XSLT processor and XSL-FO processor software installed on your
system. Check variables
The stylesheet argument
%s in variable
org-export-docbook-xslt-proc-command is replaced by the value of
org-export-docbook-xslt-stylesheet, which needs to be set by
the user. You can also overrule this global setting on a per-file basis by
adding an in-buffer setting
#+XSLT: to the Org file.