---
title: "init(target_desc:weights:bias:)"
framework: accelerate
role: symbol
role_heading: Initializer
path: "accelerate/bnnsmhaprojectionparameters/init(target_desc:weights:bias:)"
---

# init(target_desc:weights:bias:)

Returns a new multihead attention projection parameters structure from the specified parameters.

## Declaration

```swift
init(target_desc: BNNSNDArrayDescriptor, weights: BNNSNDArrayDescriptor, bias: BNNSNDArrayDescriptor)
```

## Parameters

- `target_desc`: The descriptor—which is either an input query, key, or value, or an output—of the main target of the operation.
- `weights`: The descriptor of the initial projection’s weights.
- `bias`: The descriptor of the initial projection’s bias.

## See Also

### Initializers

- [init()](accelerate/bnnsmhaprojectionparameters/init().md)