When more than one input file is given, each has to be preceded by <pre>-i</pre> flag. The files are imported in the specified order, i.e. <pre> -i file1 -i file2 </pre> and <pre> -i file2 -i file1 </pre> might produce different GRAMPS IDs in the resulting database.

The files destined for export can be specified with the <pre>-e filename</pre> or <pre>--export=filename</pre> option. The format can be specified with the <pre>-f</pre> option immediately following the ''filename'' . If not specified, the guess will be attempted based on the ''filename'' . For iso format, the ''filename'' is actually the name of directory the Gramps database will be written into. For gramps-xml, gpkg, gedcom, wft, geneweb, and gramps-pkg, the ''filename'' is the name of the resulting file.