Custom semantic types
You can derive custom semantic types based on the ones in the i2 Semantic Type Library, then use them in other charts and share them with colleagues. Deriving a custom semantic type is appropriate when you need a more accurate classification of your data than the standard type library provides.
When you derive custom semantic types and assign them to items on your chart, they are saved as part of your chart. You cannot delete the standard types from the i2 Semantic Type Library, but you can delete any custom semantic types that are not in use on the chart. After you remove all assignments of a custom semantic type, to access the Delete command you must first close and reopen the Chart Properties window.