diff --git a/docs/frontend-system/building-plugins/04-built-in-data-refs.md b/docs/frontend-system/building-plugins/04-built-in-data-refs.md
new file mode 100644
index 0000000000..ee6875e1cb
--- /dev/null
+++ b/docs/frontend-system/building-plugins/04-built-in-data-refs.md
@@ -0,0 +1,24 @@
+---
+id: built-in-data-refs
+title: Built-in data refs
+sidebar_label: Built-in data refs
+# prettier-ignore
+description: Configuring or overriding built-in data refs
+---
+
+## Disable built-in data refs
+
+## Override built-in data refs
+
+## Default built-in data refs
+
+### Example
+
+#### Example
+
+Extensions that provides a default `light` and `dark` app themes.
+
+| kind  | namespace | name  |        id         |
+| :---: | :-------: | :---: | :---------------: |
+| theme |    app    | light | `theme:app/light` |
+| theme |    app    | dark  | `theme:app/dark`  |
diff --git a/microsite/sidebars.json b/microsite/sidebars.json
index e32e027807..754e26ec9f 100644
--- a/microsite/sidebars.json
+++ b/microsite/sidebars.json
@@ -414,7 +414,8 @@
         "items": [
           "frontend-system/building-plugins/index",
           "frontend-system/building-plugins/testing",
-          "frontend-system/building-plugins/extension-types"
+          "frontend-system/building-plugins/extension-types",
+          "frontend-system/building-plugins/built-in-data-refs"
         ]
       },
       {