diff --git a/main/clients.bs b/main/clients.bs
index a0778951..b12e46d8 100644
--- a/main/clients.bs
+++ b/main/clients.bs
@@ -4,23 +4,38 @@ Clients and Apps {#clients}
Issue: Write introduction to the Clients and Apps section.
-## Cross-Origin Resource Sharing ## {#cors}
+## Implementation Guidance ## {#client-guidance}
+This section is non-normative.
-Issue: Write Cross-Origin Resource Sharing section.
+Issue: Write Implementation Guidance section.
-A Solid data pod MUST conform to the CORS specification [[!FETCH]].
+## Data Shapes and Footprints ## {#shapes-footprints}
-## Implementation Guidance ## {#client-guidance}
+Issue: Write introduction to Data Shapes and Footprints section.
+
+
+### Data Shapes ### {#shapes}
+Issue: Write Data Shapes section.
-Issue: Write Implementation Guidance section.
+
+### Footprints ### {#footprints}
+Issue: Write Footprints section.
## Data Shape Guidance ## {#shape-guidance}
+This section is non-normative.
Issue: Write Data Shape Guidance section.
+## Cross-Origin Resource Sharing ## {#cors}
+
+Issue: Write Cross-Origin Resource Sharing section.
+
+A Solid data pod MUST conform to the CORS specification [[!FETCH]].
+
+
## Update Notifications ## {#notifications}
Issue: Write Update Notification section.