(l-onnx-doc-OptionalHasElement)=

# OptionalHasElement


(l-onnx-op-optionalhaselement-18)=

## OptionalHasElement - 18

### Version

- **name**: [OptionalHasElement (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#OptionalHasElement)
- **domain**: `main`
- **since_version**: `18`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 18**.

### Summary

Returns true if (1) the input is an optional-type and contains an element,
or, (2) the input is a tensor or sequence type.
If the input is not provided or is an empty optional-type, this op returns false.

### Inputs

Between 0 and 1 inputs.

- **input** (optional, heterogeneous) - **O**:

  The optional input.

### Outputs

- **output** (heterogeneous) - **B**:

  A scalar boolean tensor. If true, it indicates that optional-type input contains an element. Otherwise, it is empty.

### Type Constraints

* **O** in ( `optional(seq(tensor(bool)))`, `optional(seq(tensor(complex128)))`, `optional(seq(tensor(complex64)))`, `optional(seq(tensor(double)))`, `optional(seq(tensor(float)))`, `optional(seq(tensor(float16)))`, `optional(seq(tensor(int16)))`, `optional(seq(tensor(int32)))`, `optional(seq(tensor(int64)))`, `optional(seq(tensor(int8)))`, `optional(seq(tensor(string)))`, `optional(seq(tensor(uint16)))`, `optional(seq(tensor(uint32)))`, `optional(seq(tensor(uint64)))`, `optional(seq(tensor(uint8)))`, `optional(tensor(bool))`, `optional(tensor(complex128))`, `optional(tensor(complex64))`, `optional(tensor(double))`, `optional(tensor(float))`, `optional(tensor(float16))`, `optional(tensor(int16))`, `optional(tensor(int32))`, `optional(tensor(int64))`, `optional(tensor(int8))`, `optional(tensor(string))`, `optional(tensor(uint16))`, `optional(tensor(uint32))`, `optional(tensor(uint64))`, `optional(tensor(uint8))`, `seq(tensor(bool))`, `seq(tensor(complex128))`, `seq(tensor(complex64))`, `seq(tensor(double))`, `seq(tensor(float))`, `seq(tensor(float16))`, `seq(tensor(int16))`, `seq(tensor(int32))`, `seq(tensor(int64))`, `seq(tensor(int8))`, `seq(tensor(string))`, `seq(tensor(uint16))`, `seq(tensor(uint32))`, `seq(tensor(uint64))`, `seq(tensor(uint8))`, `tensor(bool)`, `tensor(complex128)`, `tensor(complex64)`, `tensor(double)`, `tensor(float)`, `tensor(float16)`, `tensor(int16)`, `tensor(int32)`, `tensor(int64)`, `tensor(int8)`, `tensor(string)`, `tensor(uint16)`, `tensor(uint32)`, `tensor(uint64)`, `tensor(uint8)` ):

  Constrain input type to optional tensor and optional sequence types.
* **B** in ( `tensor(bool)` ):

  Constrain output to a boolean tensor.

```{toctree}
text_diff_OptionalHasElement_15_18
```

(l-onnx-op-optionalhaselement-15)=

## OptionalHasElement - 15

### Version

- **name**: [OptionalHasElement (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#OptionalHasElement)
- **domain**: `main`
- **since_version**: `15`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 15**.

### Summary

Returns true if the optional-type input contains an element. If it is an empty optional-type, this op returns false.

### Inputs

- **input** (heterogeneous) - **O**:

  The optional input.

### Outputs

- **output** (heterogeneous) - **B**:

  A scalar boolean tensor. If true, it indicates that optional-type input contains an element. Otherwise, it is empty.

### Type Constraints

* **O** in ( `optional(seq(tensor(bool)))`, `optional(seq(tensor(complex128)))`, `optional(seq(tensor(complex64)))`, `optional(seq(tensor(double)))`, `optional(seq(tensor(float)))`, `optional(seq(tensor(float16)))`, `optional(seq(tensor(int16)))`, `optional(seq(tensor(int32)))`, `optional(seq(tensor(int64)))`, `optional(seq(tensor(int8)))`, `optional(seq(tensor(string)))`, `optional(seq(tensor(uint16)))`, `optional(seq(tensor(uint32)))`, `optional(seq(tensor(uint64)))`, `optional(seq(tensor(uint8)))`, `optional(tensor(bool))`, `optional(tensor(complex128))`, `optional(tensor(complex64))`, `optional(tensor(double))`, `optional(tensor(float))`, `optional(tensor(float16))`, `optional(tensor(int16))`, `optional(tensor(int32))`, `optional(tensor(int64))`, `optional(tensor(int8))`, `optional(tensor(string))`, `optional(tensor(uint16))`, `optional(tensor(uint32))`, `optional(tensor(uint64))`, `optional(tensor(uint8))` ):

  Constrain input type to optional tensor and optional sequence types.
* **B** in ( `tensor(bool)` ):

  Constrain output to a boolean tensor.