diff --git a/Docs/Dev/en/SUMMARY.md b/Docs/Dev/en/SUMMARY.md
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+# Developer Content
+
+* [Structure]({%}&page=Dev/structure)
diff --git a/Docs/Dev/en/structure.md b/Docs/Dev/en/structure.md
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+# Structure
+
+## ER
+
+![ER](Modules/ContractManagement/Docs/Dev/img/er.png)
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