Federico Bruni <address@hidden> writes:
Il giorno gio 7 lug 2016 alle 9:23, David Kastrup <address@hidden> ha
scritto:
Usefulness does not come into play here as long as there is a
standard.
The PDF standard states:
Where did you take this?
PDF reference manual downloaded from Adobe web page 8 years ago.
Might
be worth looking for a newer version if they still have it there (I
seem
to remember that I had a problem finding the PLRM, the respective
document for PostScript, at one point of time in spite of having
downloaded it there once before).