javax print includes an IPP attribute NumberUp which indicates the number
of pages to print on a side of a media. The latout of these pages is however
script dependent. IPP added a PresentationDirection direction attribute to
express this, but because it was added to IPP 1.1 at a late stage it was
missing from the earlier set of attributes in javax.print. It needs to be
added now to support this IPP feature properly.