We need the documentation of MAS SDK 1.9.0.
The support website does not contains the information.
Release : 1.9
We do not maintain on support website documentation available for older versions or EOS
Currently the documentation available is MAS 2.1 ,2.2 and 2.3 , previous versions are EOS
However , from the following link you can download the documentation for older versions of MAS
https://github.com/CAAPIM/Releases/tree/master/MAS-1.9.00