In ELAN it is possible to associate a tier type with a data category of the ISO Data Category Repository (DCR). To do so click on Type in the ELAN main menu and select Change Tier Type.... In the window that now appears, click the Browse... button to the right of the ISO Data Category option. In the next window(Figure 2.10), select a category from the list and click Apply to associate the selected data category to the tier type.

Figure 2.10. Local Data Category Selection

More information about the ISO DCR and how to use it can be found in Section 2.5.