You can have some special Custom Fields that are nested.
This means that you have Custom Fields that are dependent on each other.
These Custom Fields are set up mostly like you set up all your other Custom Fields - except you do NOT enter allowed values for them.
On Admin-Custom Fields click on "Add Custom Field"
On the pop-up select the option "Nested Values"
Now you can name you Nested Custom Field - remember to have an ID that will work with your ERP system:
Now you don't have to do more in Admin.
To get data into your Nested Custom Fields you need to import them into Delogue.
Read here for the documentation for how you set up the import of your Nested Custom Fields: http://help.delogue.com/support/solutions/articles/9000101091-import-export-data-guide
Read here how you use you Nested Custom Fields on style level: http://help.delogue.com/support/solutions/articles/9000181391-edit-nested-custom-fields-pro-