# Fields

The fields that you want the action to return. You can use one of the following options:

- All. Return all fields that have been set for the specified category.

- `Field_names`. The name of one or more category fields to return. Separate multiple fields with commas. There must be no space before or after a comma.

Actions: | CategoryGetDetails CategoryGetHierDetails
Type: | String
Default: | All
Example: | `Fields=Country,Region`
See Also: |

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