Hi @Kevin Leadbeater ,
This is actually super simple in Pigment, but because its so simple its sometimes overlooked! :)
You can do DimensionB.PropertyfromB.PropertyA , you kan keep chaining these as far as you want with “.” dots in the middle.
Example
Dimension A City
Name - Country (property)
Paris - France
Dimension B Country
Name - Region
France - Europe
If you want to have the Region of Paris, you simply do City.Country.Region
I forgot the dimension chaining from earlier course. Simple is better, thank you.