VMS Vs. BMS

Can someone shed some light on the differences between a VMS and a BMS and how they relate to eachother. Say for example a VMS like iNEX from IDIS is used in a system, how would that relate to a BMS? Also, the term BIS was brought up and I'd like to understand it a bit better. When I googled BIS, I think I understood that it's just a branded BMS made by Bosch, is this correct?

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