:nosearch:

.. _op_ai_onnx_Identity-14:

Identity - version 14
=====================

This page documents version **14** of operator **Identity**. See :doc:`Identity` for the latest version (since version 25).

- **Domain**: ``ai.onnx``
- **Since version**: 14

Identity operator

**Inputs**

- **input** (*V*): Input tensor

**Outputs**

- **output** (*V*): Tensor to copy input into.

**Type Constraints**

- **V**: Constrain input and output types to all tensor and sequence types.
  Allowed types: 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(bfloat16), 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).

Examples
--------

**test_cc_identity_sequence**

.. code-block:: text

    Node:
      Identity(seq) -> (seq_out)

.. code-block:: text

    Inputs:
      seq: shape=(1, 2, 2), dtype=float32
        [[[1., 2.],
          [3., 4.]]]
      input_1: shape=(1, 2, 2), dtype=float32
        [[[2., 3.],
          [1., 5.]]]

    Outputs:
      seq_out: shape=(2, 1, 2, 2), dtype=float32
        [[[[1., 2.],
           [3., 4.]]],
        
        
         [[[2., 3.],
           [1., 5.]]]]

Differences with previous version (13)
--------------------------------------

**SchemaDiff**: ``Identity`` (domain ``'ai.onnx'``)

* old version: 13
* new version: 14
* breaking: **yes**

**Breaking reasons:**

* input 'input' (changed): type_str changed 'T' -> 'V'
* output 'output' (changed): type_str changed 'T' -> 'V'
* type constraint 'T' (removed): entire constraint removed

**Inputs:**

* [BREAKING] changed 'input': type_str changed 'T' -> 'V'

**Outputs:**

* [BREAKING] changed 'output': type_str changed 'T' -> 'V'

**Type constraints:**

* [BREAKING] removed 'T': entire constraint removed
* added 'V': added types: ['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(bfloat16)', '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)']