Concepts
Here you can see the principal concepts of the tool and understand how it works.
All the definitions exists to make simpler for people to understand, and make all information readable in the same way for all users, this is MAJOR requirement, because people needs to understand in the same way.
Line direction matters
The line shows the direction of the information, from System A to System B for example.
Line information
You can use it to show a information, domain, data or anything else that you consider relevant
Standard colors and shapes
All systems are rectangle with background color blue, if the system is from outside your company it will be rectangle with a gray background