org-export-as-docbook)EXPORT_FILE_NAME property, that name
will be used for the export. org-export-as-docbook-pdf-and-open)
Note
that, in order to produce PDF output based on exported
DocBook file, you need to have XSLT processor and XSL-FO
processor software installed on your system. Check variables
org-export-docbook-xslt-proc-command and
org-export-docbook-xsl-fo-proc-command.
The stylesheet argument %s in variable
org-export-docbook-xslt-proc-command is replaced
by the value of variable
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.