diff --git a/yaml/com/ibm/ipzvpd/VSBK.interface.yaml b/yaml/com/ibm/ipzvpd/VSBK.interface.yaml
index 79c34fdb..24026074 100644
--- a/yaml/com/ibm/ipzvpd/VSBK.interface.yaml
+++ b/yaml/com/ibm/ipzvpd/VSBK.interface.yaml
@@ -28,7 +28,7 @@ properties:
     - name: RB
       type: array[byte]
       description: >
-          RB keyword.
+          RB keyword. For Synergy Brand systems.
     - name: WN
       type: array[byte]
       description: >
@@ -48,7 +48,7 @@ properties:
     - name: ES
       type: array[byte]
       description: >
-          ES keyword.
+          ES keyword. Copy of VCEN SE.
     - name: LX
       type: array[byte]
       description: >
@@ -56,12 +56,40 @@ properties:
     - name: D0
       type: array[byte]
       description: >
-          D0 keyword.
+          D0 keyword. Memory mirror.
+    - name: D1
+      type: array[byte]
+      description: >
+          D1 keyword. BIOS attribute.
+    - name: D2
+      type: array[byte]
+      description: >
+          D2 keyword.
+    - name: D3
+      type: array[byte]
+      description: >
+          D3 keyword.
+    - name: D4
+      type: array[byte]
+      description: >
+          D4 keyword.
+    - name: F0
+      type: array[byte]
+      description: >
+          F0 keyword. ACF Replay ID.
+    - name: F4
+      type: array[byte]
+      description: >
+          F4 keyword.
     - name: F5
       type: array[byte]
       description: >
-          F5 keyword.
+          F5 keyword. IPS Brand name.
     - name: F6
       type: array[byte]
       description: >
-          F6 keyword.
+          F6 keyword. IPS Brand name.
+    - name: F7
+      type: array[byte]
+      description: >
+          F7 keyword.