diff --git a/followthemoney/schema/Occupancy.yaml b/followthemoney/schema/Occupancy.yaml
index 95a139d06..4d150b588 100644
--- a/followthemoney/schema/Occupancy.yaml
+++ b/followthemoney/schema/Occupancy.yaml
@@ -11,6 +11,14 @@ Occupancy:
   required:
     - holder
     - post
+  edge:
+    source: holder
+    label: holds
+    target: post
+    directed: true
+    caption: 
+      - startDate
+      - endDate
   properties:
     holder:
       label: "Holder"
diff --git a/followthemoney/schema/Position.yaml b/followthemoney/schema/Position.yaml
index 4d7ea758c..ae980565e 100644
--- a/followthemoney/schema/Position.yaml
+++ b/followthemoney/schema/Position.yaml
@@ -16,11 +16,15 @@ Position:
   featured:
     - name
     - organization
-    - category
   caption:
     - name
   required:
     - name
+  temporalExtent:
+    start:
+      - inceptionDate
+    end:
+      - dissolutionDate
   properties:
     organization:
       label: "Organization"
@@ -32,9 +36,6 @@ Position:
     name:
       label: "Name"
       type: name
-    category:
-      label: "Category"
-      type: string
     description:
       label: "Description"
       type: text