Added notes

Author: dsmits

docs/index.md

@@ -7,3 +7,21 @@ Things to explain:
 - what are processes
 - what are workers
 - Things to reuse, things to implement
+
+## Processes
+
+## Resources
+Resources are objects that implement PythonLabs `ServiceResource`. Many are available in pythonlab, but sometimes it might be required to implement a custom one.
+
+## Workers
+Worker_adaptation also needs to be custom.
+Worker calls steps through the wrappers, and returns the Observable object to orchestrator. 
+
+## Wrappers
+Wrappers implement calls to actual sila servers. In worker the devices are still just conceptual. 
+
+## Sila servers
+Sila servers have 2 types of commands, one type is observable, other isn’t. If sila command isn’t observable, you have to fake the observable in the wrapper 
+
+## Config file
+Describes the capacity of the devices in your lab. This information is read by both the orchestrator and scheduler.