data-apis · rgommers · Oct 8, 2020 · Sep 24, 2020 · Sep 24, 2020 · Oct 8, 2020
diff --git a/spec/API_specification/index.rst b/spec/API_specification/index.rst
@@ -19,4 +19,5 @@ API specification
    linear_algebra_functions
    searching_functions
    set_functions
+   utility_functions
    constants
diff --git a/spec/API_specification/utility_functions.md b/spec/API_specification/utility_functions.md
@@ -0,0 +1,62 @@
+# Utility Functions
+
+> Array API specification for utility functions.
+
+A conforming implementation of the array API standard must provide and support the following functions adhering to the following conventions.
+
+-   Positional parameters must be [positional-only](https://www.python.org/dev/peps/pep-0570/) parameters. Positional-only parameters have no externally-usable name. When a function accepting positional-only parameters is called, positional arguments are mapped to these parameters based solely on their order.
+-   Optional parameters must be [keyword-only](https://www.python.org/dev/peps/pep-3102/) arguments.
+-   Broadcasting semantics must follow the semantics defined in :ref:`broadcasting`.
+-   Unless stated otherwise, functions must support the data types defined in :ref:`data-types`.
+-   Unless stated otherwise, functions must adhere to the type promotion rules defined in :ref:`type-promotion`.
+-   Unless stated otherwise, floating-point operations must adhere to IEEE 754-2019.
+
+<!-- NOTE: please keep the functions in alphabetical order -->
+
+### <a name="all" href="#all">#</a> all(x, /, *, axis=None, keepdims=False)
+
+Tests whether all input array elements evaluate to `True` along a specified axis.
+
+#### Parameters
+
+-   **x**: _&lt;array&gt;_
+
+    -   input array.
+
+-   **axis**: _Optional\[ Union\[ int, Tuple\[ int, ... ] ] ]_
+
+    -   axis or axes along which to perform a logical AND reduction. By default, a logical AND reduction must be performed over the entire array. If a tuple of integers, logical AND reductions must be performed over multiple axes. A valid `axis` must be an integer on the interval `[-N, N)`, where `N` is the rank (number of dimensions) of `x`. If an `axis` is specified as a negative integer, the function must determine the axis along which to perform a reduction by counting backward from the last dimension (where `-1` refers to the last dimension). If provided an invalid `axis`, the function must raise an exception. Default: `None`.
+
+-   **keepdims**: _bool_
+
+    -   If `True`, the reduced axes (dimensions) must be included in the result as singleton dimensions, and, accordingly, the result must be compatible with the input array (see :ref:`broadcasting`). Otherwise, if `False`, the reduced axes (dimensions) must not be included in the result. Default: `False`.
+
+#### Returns
+
+-   **out**: _&lt;array&gt;_
+
+    -   if a logical AND reduction was performed over the entire array, a zero-dimensional array containing the test result; otherwise, a non-zero-dimensional array containing the test results. The returned array must be a boolean array (i.e., an array whose underlying data type is `bool`).
+
+### <a name="any" href="#any">#</a> any(x, /, *, axis=None, keepdims=False)
+
+Tests whether any input array element evaluates to `True` along a specified axis.
+
+#### Parameters
+
+-   **x**: _&lt;array&gt;_
+
+    -   input array.
+
+-   **axis**: _Optional\[ Union\[ int, Tuple\[ int, ... ] ] ]_
+
+    -   axis or axes along which to perform a logical OR reduction. By default, a logical OR reduction must be performed over the entire array. If a tuple of integers, logical OR reductions must be performed over multiple axes. A valid `axis` must be an integer on the interval `[-N, N)`, where `N` is the rank (number of dimensions) of `x`. If an `axis` is specified as a negative integer, the function must determine the axis along which to perform a reduction by counting backward from the last dimension (where `-1` refers to the last dimension). If provided an invalid `axis`, the function must raise an exception. Default: `None`.
+
+-   **keepdims**: _bool_
+
+    -   If `True`, the reduced axes (dimensions) must be included in the result as singleton dimensions, and, accordingly, the result must be compatible with the input array (see :ref:`broadcasting`). Otherwise, if `False`, the reduced axes (dimensions) must not be included in the result. Default: `False`.
+
+#### Returns
+
+-   **out**: _&lt;array&gt;_
+
+    -   if a logical OR reduction was performed over the entire array, a zero-dimensional array containing the test result; otherwise, a non-zero-dimensional array containing the test results. The returned array must be a boolean array (i.e., an array whose underlying data type is `bool`).