[iTS 1.1.50] Why 3 bridges requires to synchronize empty file?

Hi,

using iTwin Synchronizer 1.1.50, completely new project, new iModel etc.

I created synchronization definition and assigned an empty file, just created in MicroStation CE U14, to this definition. To finish the definition, 3 iModelBridges were required to be installed: MicroStation, civil and building.

Why all 3, representing > 7 GB occupied on disk, are required?

For this specific (mostly testing) project, I know that nothing than MicroStation elements and features will be required.

Regards,

  Jan