On Tue, 2 Sep 2025 10:53:19 +0100, Jonathan Scott <jonathan.scott...@gmail.com> 
wrote:

>For an example of how IBM document programming interfaces, see the following 
>page for Db2:
>
>https://www.ibm.com/docs/en/db2-for-zos/13.0.0?topic=notices-programming-interface-information

It's very rare for a product to specifically document GUPI and PSPI. 

>IBM is obviously well aware that vendors and customers are using programs 
> to process listings, messages and perform screen-scraping, 

IBM is an active participant (not just aware). E.g. DB2 GUPI / PSPI above 
specifically identifies listings (command & utilities) and messages. Netview, 
GDPS, TSO & other IBM products directly access these interfaces. IBM is 
encouraging us to use these interfaces.

> so it tries to avoid unnecessary change and calls attention to necessary 
> change.  

IBM goes to great lengths to avoid customer calls. I've been brought in on 
customer calls to negotiate a compromise that both IBM and my customer can live 
with. 

>However, there is no guarantee that changes will be compatible

We are computer people, and we thrive on change. However, there is a limit to 
the amount of change. E.g. you're not going to mix case 1,000 messages at one 
time because who wants to check those 1,000 messages are not used in automation.

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