diff --git a/.changeset/dry-sloths-impress.md b/.changeset/dry-sloths-impress.md
new file mode 100644
index 0000000000..6bd5ba4156
--- /dev/null
+++ b/.changeset/dry-sloths-impress.md
@@ -0,0 +1,5 @@
+---
+'@backstage/catalog-model': minor
+---
+
+Introduce a domain attribute to the domain entity to allow a hierarchy of domains to exist.
diff --git a/docs/features/software-catalog/descriptor-format.md b/docs/features/software-catalog/descriptor-format.md
index 52ba540430..1c95cfeb2a 100644
--- a/docs/features/software-catalog/descriptor-format.md
+++ b/docs/features/software-catalog/descriptor-format.md
@@ -1240,6 +1240,7 @@ metadata:
   description: Everything about artists
 spec:
   owner: artist-relations-team
+  domain: audio-domain
 ```
 
 In addition to the [common envelope metadata](#common-to-all-kinds-the-metadata)