Bug#397440: hplip recommends linuxprinting.org-ppds, why?

[Fabian Greffrath <fabian@ep1.rub.de>]

package: hplip
version: 1.6.10-2
severity: minor

Hello!

I've seen that hplip recommends both hpijs-ppds and
linuxprinting.org-ppds. 

Why does it do so? 
Doesn't it work with the phijs-ppds alone? 
Does it work with other ppds at all?

The package description for linuxprinting.org-ppds says:
"If you have non-PostScript printers, the foomatic-filters-ppds and
hplip-ppds packages are the ones you need; this package won't be of much
help to you."
Unfortunately, this sound rather useless to me. Consider that this
package takes 18.4MB when it gets installed automatically by e.g.
aptitude (which installs 'recommends' additional to 'depends' by
default).

Thank you for your effort!

Greetings,
Fabian