diff --git a/src/libs/ifc/schema/pattern/v0.7.5.xsd b/src/libs/ifc/schema/pattern/v0.7.5.xsd
index 93d1457dc..c7597797c 100644
--- a/src/libs/ifc/schema/pattern/v0.7.5.xsd
+++ b/src/libs/ifc/schema/pattern/v0.7.5.xsd
@@ -740,6 +740,14 @@
       <xs:selector xpath=".//increment"/>
       <xs:field xpath="@name"/>
     </xs:unique>
+    <xs:unique name="uniqueDrawName">
+      <xs:selector xpath="draw"/>
+      <xs:field xpath="@name"/>
+    </xs:unique>
+    <xs:unique name="uniquePatternMaterialNumber">
+      <xs:selector xpath="patternMaterials/material"/>
+      <xs:field xpath="@number"/>
+    </xs:unique>
   </xs:element>
   <xs:simpleType name="shortName">
     <xs:restriction base="xs:string">