BEA Evidence

Does anyone know how Flexera captures BEA evidence e.g. what files does it look in/what commands does it run ?

I have a server where it can detect that Oracle Service Bus is installed and another where it is installed and it is not detected.

In the ndi file of the detected server I can see - <Package Name="Oracle Service Bus" Evidence="BEA" Version="10.3.1.0">

Any ideas where this is grabbed from

Thanks