[tex-k] dvips: BeginPaperSize in postscript DSC

[Karl Berry]

    %%BeginPaperSize:
    %%EndPaperSize
    The comments %%BeginFeature: and %%EndFeature should be substituted.

What is the exact syntax, please?

I wonder what this change would break, ie, what (if anything) uses the
begin/endpapersize.  Is it possible to use both?

    Similarly, the %%Papersize comment is (loc. cit., p 101)
    to be replaced (since 1992) by a %%PageMedia comment.

Is the syntax for %%PageMedia the same, that is,
%%PageMedia: Letter
Or did Adobe make it more complicated?

And again, would it work to add the pagemedia comment to config.ps in
addition to the %%PaperSize, or does it have to replace?  I would be
worried that other software might still want %%PaperSize, however old it
is.  (Even if Adobe likes to be incompatible, we don't have to.)

I'm not sure why the "@ A4Size" has a %%PaperSize comment, but the
"@ letterSize" doesn't.  Tom(s)?

Thanks,
Karl