(l-onnx-doc-StringConcat)=

# StringConcat


(l-onnx-op-stringconcat-20)=

## StringConcat - 20

### Version

- **name**: [StringConcat (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#StringConcat)
- **domain**: `main`
- **since_version**: `20`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 20**.

### Summary

StringConcat concatenates string tensors elementwise (with NumPy-style broadcasting support)

### Inputs

- **X** (heterogeneous) - **T**:

  Tensor to prepend in concatenation
- **Y** (heterogeneous) - **T**:

  Tensor to append in concatenation

### Outputs

- **Z** (heterogeneous) - **T**:

  Concatenated string tensor

### Type Constraints

* **T** in ( `tensor(string)` ):

  Inputs and outputs must be UTF-8 strings