There has been much debate whether GSIM should make a differentiation between unit data and dimensional data. For GSIM v1.0, it was decided that the distinction was retained. There were two reasons for this:
- The distinction is important enough distinction to National Statistical Offices that it should be retained in the model.
- The proposals for how to change the model were thought to be too big a change to take on in the timeframe available.
Here are some the relevant proposals and reviews that have been received on the topic.