REQUEST adding a new unit: meter squared per gram

[ammar257ammar]

I am working on a dataset that contains a unit for specific surface area (SSA) which is m^2/g (meter squared per gram) Specific surface area (SSA) is a property of solids defined as the total surface area of a material per unit of mass, (with units of m2/kg or m2/g) I would really appreciate it if this unit can be added to the Unit Ontology

[reality]

Thanks for the request. So I think this would require:

• A new subclass of area unit (UO:0000047) 'surface area unit'
• With new subclasses for m2kg and m2/g?

Could you please confirm, and also it would be helpful if you could provide descriptions for the new classes.