diff --git a/lexicons/my/spoor/content/external.json b/lexicons/my/spoor/content/external.json
index fd272af..fc6f470 100644
--- a/lexicons/my/spoor/content/external.json
+++ b/lexicons/my/spoor/content/external.json
@@ -14,7 +14,7 @@
             "minLength": 1,
             "items": {
               "type": "ref",
-              "ref": "my.spoor.content.defs#title"
+              "ref": "my.spoor.content.title"
             }
           },
           "source": {
diff --git a/lexicons/my/spoor/content/media.json b/lexicons/my/spoor/content/media.json
index ec383d1..e8897c2 100644
--- a/lexicons/my/spoor/content/media.json
+++ b/lexicons/my/spoor/content/media.json
@@ -14,7 +14,7 @@
             "minLength": 1,
             "items": {
               "type": "ref",
-              "ref": "my.spoor.content.defs#title"
+              "ref": "my.spoor.content.title"
             }
           },
           "durationData": {
diff --git a/lexicons/my/spoor/content/defs.json b/lexicons/my/spoor/content/title.json
similarity index 78%
rename from lexicons/my/spoor/content/defs.json
rename to lexicons/my/spoor/content/title.json
index f13f8fd..3368a47 100644
--- a/lexicons/my/spoor/content/defs.json
+++ b/lexicons/my/spoor/content/title.json
@@ -1,17 +1,15 @@
 {
   "lexicon": 1,
-  "id": "my.spoor.content.defs",
+  "id": "my.spoor.content.title",
   "defs": {
-    "title": {
+    "main": {
       "type": "object",
       "properties": {
         "translationType": { 
           "type": "string",
           "format": "nsid",
           "knownValues": [
-            "my.spoor.content.defs#titleHomophonic",
-            "my.spoor.content.defs#titleNative",
-            "my.spoor.content.defs#titleTranslation"
+            "#titleHomophonic", "#titleNative", "#titleTranslation"
           ]
         },
         "lang": {