diff --git a/src/lib/osm/activities-and-categories.ts b/src/lib/osm/activities-and-categories.ts
new file mode 100644
index 0000000..35e5805
--- /dev/null
+++ b/src/lib/osm/activities-and-categories.ts
@@ -0,0 +1,30 @@
+export interface TagFormatDefinition {}
+
+interface TagCategoryDefinitions {
+  [key: string]: TagFormatDefinition;
+}
+
+export enum TagType {
+  ROUTE = 'route',
+  POI = 'poi',
+}
+
+interface TagActivityDefinitions {
+  route?: { [key: string]: TagCategoryDefinitions };
+  poi?: { [key: string]: TagCategoryDefinitions };
+}
+
+export interface TagDefinitions {
+  [key: string]: TagActivityDefinitions;
+}
+
+interface TagActivitiesAndCategories {
+  [activity: string]: {
+    route?: { [key: string]: string[] };
+    poi?: { [key: string]: string[] };
+  };
+}
+
+export const getTagActivitiesAndCategories = (
+  definitions: TagDefinitions
+) => {};
diff --git a/src/lib/osm/tagsStatus.test.ts b/src/lib/osm/tags-status.test.ts
similarity index 95%
rename from src/lib/osm/tagsStatus.test.ts
rename to src/lib/osm/tags-status.test.ts
index 76506f3..6114d5f 100644
--- a/src/lib/osm/tagsStatus.test.ts
+++ b/src/lib/osm/tags-status.test.ts
@@ -1,5 +1,5 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
-import { getTagStatus } from './tagsStatus';
+import { getTagStatus } from './tags-status';
 
 describe('The getTagStatus function', () => {
   it('should return undefined/false for a tag that does NOT exist', () => {
diff --git a/src/lib/osm/tagsStatus.ts b/src/lib/osm/tags-status.ts
similarity index 65%
rename from src/lib/osm/tagsStatus.ts
rename to src/lib/osm/tags-status.ts
index 4c7bbb8..95f773b 100644
--- a/src/lib/osm/tagsStatus.ts
+++ b/src/lib/osm/tags-status.ts
@@ -1,22 +1,8 @@
-interface TagFormatDefinition {}
-
-interface TagCategoryDefinitions {
-  [key: string]: TagFormatDefinition;
-}
-
-enum TagType {
-  ROUTE = 'route',
-  POI = 'poi',
-}
-
-interface TagActivityDefinitions {
-  route?: { [key: string]: TagCategoryDefinitions };
-  poi?: { [key: string]: TagCategoryDefinitions };
-}
-
-interface TagDefinitions {
-  [key: string]: TagActivityDefinitions;
-}
+import {
+  TagDefinitions,
+  TagFormatDefinition,
+  TagType,
+} from './activities-and-categories';
 
 interface TagStatus {
   type?: TagType;
@@ -29,8 +15,8 @@ export const getTagStatus = (
   definitions: TagDefinitions,
   selectedKey: string,
   highlightedKey: string
-) => {
-  const defaultStatus: TagStatus = {
+): TagStatus => {
+  const defaultStatus = {
     highlighted: false,
   };
   const activityDefinitions = definitions[selectedKey];
@@ -47,7 +33,7 @@ export const getTagStatus = (
       if (!!highlightedDefinitions) {
         const definition = highlightedDefinitions[tag];
         if (!!definition) {
-          return { type, definition, highlighted: true } as TagStatus;
+          return { type, definition, highlighted: true };
         }
       }
 
@@ -56,7 +42,7 @@ export const getTagStatus = (
           const categoryDefinitions = typeDefinitions[category];
           const definition = categoryDefinitions[tag];
           if (!!definition) {
-            return { type, definition, highlighted: false } as TagStatus;
+            return { type, definition, highlighted: false };
           }
         }
       }