diff --git a/src/sections/conformance.md b/src/sections/conformance.md
index 7e3d281..00789ad 100644
--- a/src/sections/conformance.md
+++ b/src/sections/conformance.md
@@ -35,11 +35,14 @@ This document uses the following RDF vocabularies and corresponding namespace pr
       <th> Namespace
       <th> Description
   <tbody>
+    <tr>
+      <td> <code>rdf
+      <td> <samp>https://www.w3.org/1999/02/22-rdf-syntax-ns#
+      <td> [[!RDF-SCHEMA]]
     <tr>
       <td> <code>xs
       <td> <samp>http://www.w3.org/2001/XMLSchema#
       <td> [[!XMLSCHEMA11-1]]
-  <tbody>
     <tr>
       <td> <code>as
       <td> <samp>https://www.w3.org/ns/activitystreams#
diff --git a/src/sections/data-model.md b/src/sections/data-model.md
index b549dbc..af08300 100644
--- a/src/sections/data-model.md
+++ b/src/sections/data-model.md
@@ -8,13 +8,13 @@ A [PREP] notification from an LDP Resource on a [=Solid server=] MUST have the f
 
 <dl>
 
-  <dt id="notification-property-id"><code>*id* &lt;xs:string></code>
-  <dd> an opaque identifier for the notification. Can be used to set `Last-Event-ID` in a subsequent [PREP] notifications request.
+  <dt id="notification-property-id"><code>*id* &lt;rdfs:subject></code>
+  <dd> a unique identifier for a notification.
 
-  <dt id="notification-property-type"><code>*type* &lt;as:Activity></code>
+  <dt id="notification-property-type"><code>*as:type* &lt;as:Activity></code>
   <dd> the [[ACTIVITYSTREAMS-VOCABULARY#activity-types|type of activity]] that triggered the notification.
 
-  <dt id="notification-property-published"><code>*published* &lt;xs:dateTime></code>
+  <dt id="notification-property-published"><code>*as:published* &lt;xs:dateTime></code>
   <dd> the date and time of the notification.
 
 </dl>
@@ -23,8 +23,8 @@ A [PREP] notification from an LDP Resource on a [=Solid server=] SHOULD have the
 
 <dl>
 
-  <dt id="notification-property-state"><code>*state* &lt;xs:string></code>
-  <dd> an opaque identifier for the last known state of the resource.
+  <dt id="notification-property-state"><code>*notify:state* &lt;xs:string></code>
+  <dd> an opaque identifier for the last known state of the resource. Can be used to set `Last-Event-ID` in a subsequent [PREP] notifications request.
 
 </dl>