.. _op_ai_onnx_OptionalHasElement-15:

OptionalHasElement - version 15
===============================

This page documents version **15** of operator **OptionalHasElement**. See :doc:`OptionalHasElement` for the latest version (since version 18).

- **Domain**: ``ai.onnx``
- **Since version**: 15

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

**Inputs**

- **input** (*O*): The optional input.

**Outputs**

- **output** (*B*): A scalar boolean tensor. If true, it indicates that optional-type input contains an element. Otherwise, it is empty.

**Type Constraints**

- **O**: Constrain input type to optional tensor and optional sequence types.
  Allowed types: 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)).
- **B**: Constrain output to a boolean tensor.
  Allowed types: tensor(bool).