4 files changed, 145 insertions, 0 deletions
diff --git a/src/data/composite/things/track/index.js b/src/data/composite/things/track/index.js
index 3354b1c4..cc723a24 100644
--- a/src/data/composite/things/track/index.js
+++ b/src/data/composite/things/track/index.js
@@ -1,5 +1,7 @@
 export {default as exitWithoutUniqueCoverArt} from './exitWithoutUniqueCoverArt.js';
+export {default as inferredAdditionalNameList} from './inferredAdditionalNameList.js';
 export {default as inheritFromOriginalRelease} from './inheritFromOriginalRelease.js';
+export {default as sharedAdditionalNameList} from './sharedAdditionalNameList.js';
 export {default as trackReverseReferenceList} from './trackReverseReferenceList.js';
 export {default as withAlbum} from './withAlbum.js';
 export {default as withAlwaysReferenceByDirectory} from './withAlwaysReferenceByDirectory.js';
diff --git a/src/data/composite/things/track/inferredAdditionalNameList.js b/src/data/composite/things/track/inferredAdditionalNameList.js
new file mode 100644
index 00000000..9cf158c6
--- /dev/null
+++ b/src/data/composite/things/track/inferredAdditionalNameList.js
@@ -0,0 +1,67 @@
+// Infers additional name entries from other releases that were titled
+// differently; the corresponding releases are stored in eacn entry's "from"
+// array, which will include multiple items, if more than one other release
+// shares the same name differing from this one's.
+
+import {input, templateCompositeFrom} from '#composite';
+import {chunkByProperties} from '#wiki-data';
+
+import {exitWithoutDependency} from '#composite/control-flow';
+import {withFilteredList, withPropertyFromList} from '#composite/data';
+import {withThingsSortedAlphabetically} from '#composite/wiki-data';
+
+import withOtherReleases from './withOtherReleases.js';
+
+export default templateCompositeFrom({
+  annotation: `inferredAdditionalNameList`,
+
+  compose: false,
+
+  steps: () => [
+    withOtherReleases(),
+
+    exitWithoutDependency({
+      dependency: '#otherReleases',
+      mode: input.value('empty'),
+      value: input.value([]),
+    }),
+
+    withPropertyFromList({
+      list: '#otherReleases',
+      property: input.value('name'),
+    }),
+
+    {
+      dependencies: ['#otherReleases.name', 'name'],
+      compute: (continuation, {
+        ['#otherReleases.name']: releaseNames,
+        ['name']: ownName,
+      }) => continuation({
+        ['#nameFilter']:
+          releaseNames.map(name => name !== ownName),
+      }),
+    },
+
+    withFilteredList({
+      list: '#otherReleases',
+      filter: '#nameFilter',
+    }).outputs({
+      '#filteredList': '#differentlyNamedReleases',
+    }),
+
+    withThingsSortedAlphabetically({
+      things: '#differentlyNamedReleases',
+    }).outputs({
+      '#sortedThings': '#differentlyNamedReleases',
+    }),
+
+    {
+      dependencies: ['#differentlyNamedReleases'],
+      compute: ({
+        ['#differentlyNamedReleases']: releases,
+      }) =>
+        chunkByProperties(releases, ['name'])
+          .map(({name, chunk}) => ({name, from: chunk})),
+    },
+  ],
+});
diff --git a/src/data/composite/things/track/sharedAdditionalNameList.js b/src/data/composite/things/track/sharedAdditionalNameList.js
new file mode 100644
index 00000000..1806ec80
--- /dev/null
+++ b/src/data/composite/things/track/sharedAdditionalNameList.js
@@ -0,0 +1,38 @@
+// Compiles additional names directly provided by other releases.
+
+import {input, templateCompositeFrom} from '#composite';
+
+import {exitWithoutDependency, exposeDependency}
+  from '#composite/control-flow';
+import {withFlattenedList, withPropertyFromList} from '#composite/data';
+
+import withOtherReleases from './withOtherReleases.js';
+
+export default templateCompositeFrom({
+  annotation: `sharedAdditionalNameList`,
+
+  compose: false,
+
+  steps: () => [
+    withOtherReleases(),
+
+    exitWithoutDependency({
+      dependency: '#otherReleases',
+      mode: input.value('empty'),
+      value: input.value([]),
+    }),
+
+    withPropertyFromList({
+      list: '#otherReleases',
+      property: input.value('additionalNames'),
+    }),
+
+    withFlattenedList({
+      list: '#otherReleases.additionalNames',
+    }),
+
+    exposeDependency({
+      dependency: '#flattenedList',
+    }),
+  ],
+});
diff --git a/src/data/composite/things/track/trackAdditionalNameList.js b/src/data/composite/things/track/trackAdditionalNameList.js
new file mode 100644
index 00000000..65a2263d
--- /dev/null
+++ b/src/data/composite/things/track/trackAdditionalNameList.js
@@ -0,0 +1,38 @@
+// Compiles additional names from various sources.
+
+import {input, templateCompositeFrom} from '#composite';
+import {isAdditionalNameList} from '#validators';
+
+import withInferredAdditionalNames from './withInferredAdditionalNames.js';
+import withSharedAdditionalNames from './withSharedAdditionalNames.js';
+
+export default templateCompositeFrom({
+  annotation: `trackAdditionalNameList`,
+
+  compose: false,
+
+  update: {validate: isAdditionalNameList},
+
+  steps: () => [
+    withInferredAdditionalNames(),
+    withSharedAdditionalNames(),
+
+    {
+      dependencies: [
+        '#inferredAdditionalNames',
+        '#sharedAdditionalNames',
+        input.updateValue(),
+      ],
+
+      compute: ({
+        ['#inferredAdditionalNames']: inferredAdditionalNames,
+        ['#sharedAdditionalNames']: sharedAdditionalNames,
+        [input.updateValue()]: providedAdditionalNames,
+      }) => [
+        ...providedAdditionalNames ?? [],
+        ...sharedAdditionalNames,
+        ...inferredAdditionalNames,
+      ],
+    },
+  ],
+});