A dimension is an axis of analysis in a multidimensional structure.
The dimension is made of an ordered list of attributes that share a common semantic meaning in the domain being modeled. Each attribute designates a unique position along the axis.
The dimension can be mapped to tables or views: this mapping allows to transfer operational data to the dimension.
For more information on object mapping, see Core Features Guide > Linking and Synchronizing Models > Object Mappings > Mappings between Operational, Data Warehouse, and OLAP Databases.
A dimension may have one or more hierarchies representing attribute sets.