Hierarchical organization of the odML terminologies

Hello,
Currently the odML terminologies are roughly organized into general categories like "software", "hardware"... and at the same level rather specific categories like "person", "blackrock", "preparation", ..
I think it would help to rearrange this organization logically by eg adding "blackrock" and "electrode" to "hardware" and maybe even introduce subfolders for different implementations of the same. This would make it easier to guess the content of sections with rather imprecise names like "preparation".
Ideally, this could be a first step to go in the direction of a hierarchical organization with inherited properties.
Best
Fred