.. _l-onnx-op-concat-d1-4:

Concat - 1 vs 4
===============

Next section compares an older to a newer version of the same operator 
after both definition are converted into markdown text.
Green means an addition to the newer version, red means a deletion.
Anything else is unchanged.

.. raw:: html


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    --- a/Concat1
    +++ b/Concat4
    @@ -1 +1 @@
      Concatenate a list of tensors into a single tensor
  
      ### Attributes
  
    - * **axis - INT** :
    + * **axis - INT** (required) :
    ?                  +++++++++++
  
    -   Which axis to concat on.  Default value is 1.
    +   Which axis to concat on
  
      ### Inputs
  
      Between 1 and 2147483647 inputs.
  
      - **inputs** (variadic, heterogeneous) - **T**:
  
        List of tensors for concatenation
  
      ### Outputs
  
      - **concat_result** (heterogeneous) - **T**:
  
        Concatenated tensor
  
      ### Type Constraints
  
    - * **T** in ( tensor(double), tensor(float), tensor(float16) ):
    + * **T** in ( 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 output types to float tensors.?                             --- ^       ^
    +   Constrain output types to any tensor type.?                              ^^       ^^^^^

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