To install GeneXus SDK for Watson, you need to close GeneXus and uncompress the folder within the .zip file downloaded to the directory::
Run GeneXus and from the GX 15 IDE with an open KB, select:
Knowledge Manager\Manage Module References and you will see the module to install.
Once installed, the module can be found below the References node in the KB Explorer:
In the downloaded .zip file you will also find 2 procedures .
Test: is a test procedure with the invocation to each API and some examples of use.
GetWatsonCredentials: is a procedure in which you need to configure all the access keys obtained in Bluemix; each API has its Api key, and some of them have a username and password.
Api keys can be obtained by creating a user account at: http://bluemix.net
After obtaining the keys, they are configured in the GetWatsonCredentials procedure as shown in the image below: