# Retrieval v1

## What `retrieval_v1` Is For

`retrieval_v1` controls indexing and announcement behavior for data submitted through MK20 products.

## Struct Definition

```go
type RetrievalV1 struct {
    Indexing        bool `json:"indexing"`
    AnnouncePayload bool `json:"announce_payload"`
    AnnouncePiece   bool `json:"announce_piece"`
}
```

## Fields

* `indexing`: enable indexing flow.
* `announce_payload`: announce payload-level information.
* `announce_piece`: announce piece-level information.

## Validation Rules

* `retrieval_v1` must be enabled by provider.
* `announce_payload` requires `indexing = true`.

## Product Compatibility Rules

* `ddo_v1` requires `retrieval_v1`.
* With `ddo_v1`, `announce_piece` must be false.
* Additional context-dependent checks are applied during DDO/PDP sanitize stages.


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