IndexDescription
The low level description of a database index.
| Attributes | Type | Description | 
|---|---|---|
| name | xs:string | The index name. | 
| type | FieldType | The index type. | 
| fields | xs:string[] | The list of fields used in the index. | 
Note:
- Valid index types are primary, unique and index
 - A unique index type does not allow a duplicate value
 - An index index type can have any constraint
 - If you need to search using a specific SubscriberSource field, you can speed up the search by creating an index of the relevant fields