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## diversity


Contained in [rank-profile](https://docs.vespa.ai/en/reference/schema-reference.html#rank-profile).
Diversity is used to guarantee diversity in the different query phases.
If you have [match-phase](https://docs.vespa.ai/en/reference/schema-reference.html#match-phase), it will provide diverse results from match-phase to first-phase.
If you have [second-phase](https://docs.vespa.ai/en/reference/schema-reference.html#secondphase-rank), it will provide diverse results from first-phase to second-phase.

Read more about this in [result diversity](https://docs.vespa.ai/en/result-diversity.html).

Specify the name of an attribute that will be used to provide diversity.
Result sets are guaranteed to get at least [min-groups](https://docs.vespa.ai/en/reference/schema-reference.html#diversity-min-groups)
unique values from the [diversity attribute](https://docs.vespa.ai/en/reference/schema-reference.html#diversity-min-groups) from this phase,
but no more than max-hits. For [match-phase](https://docs.vespa.ai/en/reference/schema-reference.html#match-phase) max-hits = [match-phase max-hits](https://docs.vespa.ai/en/reference/schema-reference.html#match-phase-max-hits).
For [second-phase](https://docs.vespa.ai/en/reference/schema-reference.html#secondphase-rank) max-hits = [rerank-count](https://docs.vespa.ai/en/reference/schema-reference.html#secondphase-rerank-count)
A document is considered as a candidate if:

  The query has not yet reached the max-hits
    number produced from this phase.
  The query has not yet reached the max number of candidates in one group.
    This is computed by the max-hits
    of the phase divided by [min-groups](https://docs.vespa.ai/en/reference/schema-reference.html#diversity-min-groups)

```
diversity {
    attribute: [numeric attribute]
    min-groups: [integer]
}
``` 


[Read more](https://docs.vespa.ai/en/reference/schema-reference.html#diversity)