diff --git a/debian/var/models/schemas/model_0.1.xmls b/debian/var/models/schemas/model_0.1.xmls
index f4296dd..b2aa2ee 100644
--- a/debian/var/models/schemas/model_0.1.xmls
+++ b/debian/var/models/schemas/model_0.1.xmls
@@ -84,14 +84,7 @@
     </xs:complexType>
 </xs:element>
 
-<xs:element name="then">
-    <xs:complexType>
-    <xs:sequence minOccurs="0" maxOccurs="unbounded">
-        <xs:element minOccurs="0" ref="quote"/>
-        <xs:element ref="arrow"/>
-    </xs:sequence>
-    </xs:complexType>
-</xs:element>
+<xs:element name="then" substitutionGroup="if"/>
 
 <xs:element name="transition">
     <xs:complexType>