Modeling Guide for Post Processing Framework (PPF)

[Himanshu13]

I started working on the technical side of SAP EWM from last year and finding it quite interesting.

I came across How-To Guides for SAP Extended Warehouse Management and from there I got the PDF for the How to use PPF in EWM from this link PPF_in_SAP_EWM_2021.pdf.

But this PDF talks about 2 prerequisites 
You can find additional information in the following places:
• SAP Library: Post Processing Framework (BC-SRV-GBT) (PPF)
• SAP Community Network: Modeling Guide for Post Processing Framework (PPF) (Article)

Both of the links go to 404 error.
I am wondering if I can get these latest documents from somewhere.

I searched on SDN and SAP support portal but could not find.
I got this SDN post PPF Actions: Recursive action call saving the docu... - SAP Community but the link there is also not accessible.

Could someone point out with the link to get all the technical information of SAP EWM?

Kind regards,
Himanshu Gupta