diff --git a/docs/spec/appendixes/media_types.adoc b/docs/spec/appendixes/media_types.adoc
new file mode 100644
index 0000000..936df87
--- /dev/null
+++ b/docs/spec/appendixes/media_types.adoc
@@ -0,0 +1,9 @@
+[appendix]
+== Media Types
+
+This annex provides a reference list of known media types at the time this specification was written.
+
+NOTE: This list is not exhaustive.
+The most accurate and current list originates from the `libaaruformat` source.
+
+Content to be defined.
diff --git a/docs/spec/spec.adoc b/docs/spec/spec.adoc
index 5bfe7e7..90f475f 100644
--- a/docs/spec/spec.adoc
+++ b/docs/spec/spec.adoc
@@ -118,4 +118,8 @@ include::structs/bitstream.adoc[]
 
 <<<
 
-include::structs/track_layout.adoc[]
\ No newline at end of file
+include::structs/track_layout.adoc[]
+
+<<<
+
+include::appendixes/media_types.adoc[]
\ No newline at end of file