Index: docs/P1-ConceptualModel/ERModel.md
===================================================================
--- docs/P1-ConceptualModel/ERModel.md	(revision b715712c7d5d3ee27c932a8a9d8e0a2bc6e85127)
+++ docs/P1-ConceptualModel/ERModel.md	(revision df058387ebe7d07864d874fd1376f15512418581)
@@ -1,14 +1,8 @@
-# Entity-Relationship Model v.01
+# Entity-Relationship Model v.02
 
 ## Diagram
 
-![ERModel_v01](ERModel_v01.png)
-
-Attachments for this page: `ERModel_v01.xml` (TerraER source) and `ERModel_v01.png`
-(exported image). Open the source with TerraER 3.11:
-
-```sh
-java -jar TerraER3.11.jar     # then File → Open → ERModel_v01.xml
-```
+![ERModel_v02](ERModel_v02.png)
+
 
 Notation: Chen. Rectangles are entity sets, diamonds are relationships, ellipses