public static interface RetrievalDetails.DocumentRetrievalStrategy
**Note**: In the event of trained collections being queried, but the trained model is not used to return results, the **document_retrieval_strategy** will be listed as `untrained`.
| Modifier and Type | Field and Description | 
|---|---|
| static String | CONTINUOUS_RELEVANCY_TRAININGcontinuous_relevancy_training. | 
| static String | RELEVANCY_TRAININGrelevancy_training. | 
| static String | UNTRAINEDuntrained. | 
static final String UNTRAINED
static final String RELEVANCY_TRAINING
static final String CONTINUOUS_RELEVANCY_TRAINING
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