Using-pepcli.md

@@ -89,10 +89,10 @@ Administrative tasks:
 
 - [`castor`](#castor) provides subcommands to perform administrative tasks related to PEP's [Castor integration](Castor-integration) functionality.
    - [`castor export`](#castor-export) @@@ TODO @@@
-   - [`castor list-sp-columns`](#castor-list-sp-columns) @@@ TODO @@@
-   - [`castor list-import-columns`](#castor-list-import-columns) @@@ TODO @@@
-   - [`castor create-import-columns`](#castor-create-import-columns) @@@ TODO @@@
-   - [`castor column-name-mapping`](#castor-column-name-mapping) @@@ TODO @@@
+   - [`castor list-sp-columns`](#castor-list-sp-columns) lists short pseudonym columns that are bound to Castor studies.
+   - [`castor list-import-columns`](#castor-list-import-columns) lists columns required by PEP's [Castor import](Castor-integration#import).
+   - [`castor create-import-columns`](#castor-create-import-columns) creates columns required by PEP's [Castor import](Castor-integration#import).
+   - [`castor column-name-mapping`](#castor-column-name-mapping) allows a Data Administrator to configure [column name mappings](Castor-integration#column-name-mappings) to have PEP [import Castor data](Castor-integration#import) into appropriately named columns.
 
 ## `ama`