Fossil

	set myimport 0

	gtcore datacmd   [mymethod ExpandData]
	gtcore formatcmd [mymethod ExpandFormat]
	gtcore sortcmd   [mymethod ExpandSort]
	gtcore savecmd   [mymethod Expand1 $ac $dir $max]

	gtcore traverse $ex ; # The graph is gone after the call
	gtcore traverse $ex
	close $ac

	# Now traverse the import graph, this builds the instruction
	# map for the fossil deltas.

	gtcore datacmd   [mymethod ExpandData]
	gtcore formatcmd [mymethod ExpandFormat]
	gtcore sortcmd   [mymethod ExpandSort]
	gtcore savecmd   [mymethod Expand2]

	set myimport {}
	gtcore traverse $zp ; # The graph is gone after the call
	gtcore traverse $zp
	set filemap $myimport
	unset myimport

	# And back to import control

	$ex destroy
	$zp destroy

	return [list $filemap $revmap]
    }

    method ExpandData   {graph node} { return [$graph node get $node revnr] }
    method ExpandFormat {graph item} { return <[lindex $item 1]> } ; # revnr
    method ExpandSort   {graph candidates} {