DOCSP-15835 Bucket operator updates

source/includes/intro-aggregation-accumulator.rst

@@ -1,9 +1,19 @@
-Available for use in the :pipeline:`$group` stage, accumulators are
-operators that maintain their state (e.g. totals, maximums, minimums,
-and related data) as documents progress through the pipeline.
+Aggregation accumulator operators:
 
-When used as accumulators in the :pipeline:`$group` stage, these
-operators take as input a single expression, evaluating the expression
-once for each input document, and maintain their stage for the group of
-documents that share the same group key.
+- Maintain their state as documents progress through the aggregation
+  pipeline.
 
+- Return totals, maxima, minima, and other values.
+
+- Can be used in these aggregation pipeline stages:
+
+  - :pipeline:`$group`
+
+  - :pipeline:`$bucket`
+
+  - :pipeline:`$bucketAuto`
+
+  - :pipeline:`$setWindowFields` starting in MongoDB 5.0 (except when
+    you are using the :group:`$accumulator` or
+    :expression:`$mergeObjects` operators, which cannot be used with
+    :pipeline:`$setWindowFields`)

source/meta/aggregation-quick-reference.txt

@@ -300,8 +300,8 @@ Type Expression Operators
 
 .. _agg-quick-reference-accumulators:
 
-Accumulators (``$group``)
-~~~~~~~~~~~~~~~~~~~~~~~~~~
+Accumulators (``$group, $bucket, $bucketAuto, $setWindowFields``)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. include:: /includes/intro-aggregation-accumulator.rst
 

source/reference/operator/aggregation.txt

@@ -114,8 +114,8 @@ Type Expression Operators
 
 .. _agg-operators-group-accumulators:
 
-Accumulators (``$group``)
-~~~~~~~~~~~~~~~~~~~~~~~~~~
+Accumulators (``$group, $bucket, $bucketAuto, $setWindowFields``)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. include:: /includes/intro-aggregation-accumulator.rst