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diff --git a/src/data/composite/data/withMappedList.js b/src/data/composite/data/withMappedList.js
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+++ b/src/data/composite/data/withMappedList.js
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+// Applies a map function to each item in a list, just like a normal JavaScript
+// map.
+//
+// See also:
+//  - withFilteredList
+//  - withSortedList
+//
+// More list utilities:
+//  - excludeFromList
+//  - fillMissingListItems
+//  - withFlattenedList, withUnflattenedList
+//  - withPropertyFromList, withPropertiesFromList
+//
+
+import {input, templateCompositeFrom} from '#composite';
+
+export default templateCompositeFrom({
+  annotation: `withMappedList`,
+
+  inputs: {
+    list: input({type: 'array'}),
+    map: input({type: 'function'}),
+  },
+
+  outputs: ['#mappedList'],
+
+  steps: () => [
+    {
+      dependencies: [input('list'), input('map')],
+      compute: (continuation, {
+        [input('list')]: list,
+        [input('map')]: mapFn,
+      }) => continuation({
+        ['#mappedList']:
+          list.map(mapFn),
+      }),
+    },
+  ],
+});