Measurement Units

Simple types can contain measurement units. It is incredibly important to capture the context of some data types i.e. are you measuring an infusion in in mg/decilitre or micromole/litre etc.
Measurement units can have symbols.
Measurement units can be derived from one another - this should be traceable.
The catalogue comes preloaded with a set of SI and SI derived measurement units.
They show which data types use them AND it should be easy to see which data elements, classes, models, domains use those data types etc.
For Example:

And