diff --git a/src/depiction_targeted_preproc/panel/schema/panel.main.yaml b/src/depiction_targeted_preproc/panel/schema/panel.main.yaml
new file mode 100644
index 0000000..863aa9e
--- /dev/null
+++ b/src/depiction_targeted_preproc/panel/schema/panel.main.yaml
@@ -0,0 +1,8 @@
+fields:
+  - name: label
+    type: string
+  - name: mass
+    type: number
+  - name: type
+    type: string
+    categories: [target, standard]
diff --git a/src/depiction_targeted_preproc/panel/schema/panel.visualize.yaml b/src/depiction_targeted_preproc/panel/schema/panel.visualize.yaml
new file mode 100644
index 0000000..da2d912
--- /dev/null
+++ b/src/depiction_targeted_preproc/panel/schema/panel.visualize.yaml
@@ -0,0 +1,7 @@
+fields:
+  - name: label
+    type: string
+  - name: mass
+    type: number
+  - name: tol
+    type: number