A tour of the UI
Our Hello World example is a great start, but obviously, Decision Models and rules can do so much more. Let’s expand our Hello World example a bit more and explore KIE Sandbox along the way.
To start, you may have noticed a blue box marked Problems at the bottom right of the KIE Sandbox decision model screen, as shown in Figure 3.18:
Figure 3.18 – Issues highlighted by KIE
This screen shows when you click on the Problems button. But what do these messages mean? What is a variable, and how can it be missing a type reference? Let’s explain what variables and types are.
What is a variable?
You have almost certainly typed a formula into Excel to add two cells together – something such as = A1+B1. In this case, you’re telling Excel to go to the box (cell) named A1, take the value found there, and add it to the value that Excel finds in box (cell) B1. If the values in the boxes (cells) change, the...
