Any documentation that would be available for these services would be located in the normal ServiceDesk documentation.
there is a ASDK help file in the Altiris install: C:\Program Files\Altiris\Altiris ASDK
inside the Help folder there is a "ASDK71SP2.chm" that have all the info on ASDK/Web Services
Also you can see the web services info if you browse to your altiris console on the following locations:
NS Web Service URLs - Collection Management: http://localhost/Altiris/ASDK.NS/CollectionManagementService.asmx - Hierarchy Management: http://localhost/Altiris/ASDK.NS/HierarchyManagementService.asmx - Item Management: http://localhost/Altiris/ASDK.NS/ItemManagementService.asmx - Report Management: http://localhost/Altiris/ASDK.NS/ReportManagementService.asmx - Resource Management: http://localhost/Altiris/ASDK.NS/ResourceManagementService.asmx - Scoping Management: http://localhost/Altiris/ASDK.NS/ScopingManagementService.asmx - Security Management: http://localhost/Altiris/ASDK.NS/SecurityManagementService.asmx
Task Management Web Service URLs - Task Management: http://localhost/Altiris/ASDK.Task/TaskManagementService.asmx
I hope this help
OPs post was for APIs in ServiceDesk (or at the very least, Workflow). I don't think any of these will be very helpful.
You are correct, they are unfortunately not helpful as they do not pertain to either SD or WF.
You can see the web services for each of the ServiceDesk modules by accessing their associated web service page.
Thank you.