[Info-vax] IPP utiltiy

[Louis Krupp]

On 5/5/2021 10:19 AM, Mark Berryman wrote:
> On 5/4/21 2:49 PM, Simon Clubley wrote:
>> On 2021-05-04, Mark Berryman <mark at theberrymans.com> wrote:
>>> Based on feedback, it would appear that a number of the printers out
>>> there are designed more for mobile printing than desktop printing.  
>>> This
>>> is indicated by the document formats they support.  Typically, such
>>> printers return a supported document format list similar to the 
>>> following:
>>>
>>> application/vnd.hp-PCL: this is HP?s Printer Control Language.  It is
>>> text with escape sequences although binary data can be included when
>>> graphics are involved.
>>>
>>
>> Just for completion, there are multiple PCL versions around.
>>
>> Is there any indication of which PCL version(s) this covers ?
>
> Yes.  Each printer will have some attribute indicating which version 
> of the various protocols it supports.  Mine, for example, claims PCL 6 
> support.
>

FWIW:

PCL 5, to my knowledge, is a superset of PCL 4, which is a superset of 
PCL 3, and so on. PCL 6 (also known as PCL XL) is very different.

I haven't seen any glaring inaccuracies in the Wikipedia entry:

https://en.wikipedia.org/wiki/Printer_Command_Language#PCL_levels_1_through_5_overview

(I worked on embedded PCL 5 and PCL 6 interpreters about twenty years ago.)

Louis