[pdftex] Another request for an enhancement to pdf(La)TeX

[Martin Schröder]

2010/10/27 Hartmut Henkel <hartmut_henkel at gmx.de>:
> On Tue, 26 Oct 2010, Martin Schröder wrote:
>> 2010/10/26 André Wobst <lists at wobsta.de>:
>> > It would be nice to have a streamable TeX processor (input and
>> > output both being streams).
>>
>> Note that PDF as is is not meant to be streamed; even linearized PDF
>> technically doesn't really allow appending content to a finished PDF.
>
> why? at least for non-linearized PDF (as produced by pdftex & luatex)
> just append another xref and trailer referencing existing and new
> objects to the PDF file.

But how do you get the reader to read the new portions of the file?
And to keep the objects without new versions and replace the objects
which have new versions?

Best
   Martin