Please follow these steps to relate the classification scheme to a keyword group:

1. Go to Administrator > Keywords
2. Click Add keyword group in top right corner and a new window will open.
3. Search for the classification scheme containing the keywords.
4. After selecting it Name and Logical name is auto-filled.
   
5. Add description if needed. See Keyword Description - Helptext to Keyword Group group for more information
6. Fill in Display on content type.
7. Find the content type that will contain the keywords from the dropdown.
8. Only allow selection of classification leaf nodes: See Only Allow Selection of Classification Leaf Nodes on Keyword Group for more information on this.
9. Allow user-defined keywords: Adds a text field for each selected keyword on the content type, where a free text keyword can be added.
10. Selection order of keywords: Define the sorting of the keywords when selecting.
    
11. Limit access to keyword group on content: Keyword selection and maintenance can be limited to only selected user roles.
12. Then decide if keywords should be:
    • Shown on portal and OAI
    • Shown as filter on Portal (if 'Shown on portal and OAI' is enabled for the keyword group)
    • Shown in long renderers (Long format)
    • Shown in Web Service
13. Save the keyword group
14. Now open a Research output and verify keywords are available for selecting.