diff --git a/source/java/org/alfresco/web/forms/xforms/Schema2XForms.java b/source/java/org/alfresco/web/forms/xforms/Schema2XForms.java
index ab8ffecf47..63ce4078db 100644
--- a/source/java/org/alfresco/web/forms/xforms/Schema2XForms.java
+++ b/source/java/org/alfresco/web/forms/xforms/Schema2XForms.java
@@ -1283,9 +1283,10 @@ public class Schema2XForms implements Serializable
                       " occurs " + occurs);
 
          // create the <xforms:bind> element and add it to the model.
+         boolean isRepeated = occurs.isRepeated() || (occurs.isOptional() && (controlType instanceof XSSimpleTypeDefinition == false));
          final Element bindElement = 
             this.createBind(xformsDocument, 
-                            pathToRoot + (occurs.isRepeated() ? "[position() != last()]" : ""));
+                            pathToRoot + (isRepeated ? "[position() != last()]" : ""));
          final String bindId = bindElement.getAttributeNS(null, "id");
 
          modelSection.appendChild(bindElement);
@@ -1715,7 +1716,7 @@ public class Schema2XForms implements Serializable
                    " default instance element for " + elementName +
                    " at path " + path);
       // update the default instance
-      if (occurs.isRepeated())
+      if (occurs.isRepeated() || (occurs.isOptional() && (element.getTypeDefinition() instanceof XSSimpleTypeDefinition == false)))
       {
          LOGGER.debug("adding " + (occurs.minimum + 1) +
                       " default instance elements for " + elementName +
@@ -1758,7 +1759,8 @@ public class Schema2XForms implements Serializable
    {
 
       // add xforms:repeat section if this element re-occurs
-      if (o.maximum == 1)
+      if ((o.isOptional() && controlType instanceof XSSimpleTypeDefinition) ||
+          (o.maximum == 1 && o.minimum == 1))
       {
          return formSection;
       }
@@ -1854,14 +1856,15 @@ public class Schema2XForms implements Serializable
       }
 
       // create the <xforms:bind> element and add it to the model.
+      boolean isRepeated = occurs.isRepeated() || (occurs.isOptional() && (controlType instanceof XSSimpleTypeDefinition == false));
       Element bindElement = 
-         this.createBind(xformsDocument, pathToRoot + (occurs.isRepeated() ? "[position() != last()]" : ""));
+         this.createBind(xformsDocument, pathToRoot + (isRepeated ? "[position() != last()]" : ""));
       String bindId = bindElement.getAttributeNS(null, "id");
       modelSection.appendChild(bindElement);
       bindElement = this.startBindElement(bindElement, schema, controlType, owner, occurs);
 
       // add a group if a repeat !
-      if (owner instanceof XSElementDeclaration && occurs.maximum != 1)
+      if (owner instanceof XSElementDeclaration && occurs.isRepeated())
       {
          final Element groupElement = this.createGroup(xformsDocument,
                                                        modelSection,
diff --git a/source/java/org/alfresco/web/forms/xforms/SchemaUtil.java b/source/java/org/alfresco/web/forms/xforms/SchemaUtil.java
index 2e97d9ebcf..61e0d12016 100644
--- a/source/java/org/alfresco/web/forms/xforms/SchemaUtil.java
+++ b/source/java/org/alfresco/web/forms/xforms/SchemaUtil.java
@@ -72,6 +72,11 @@ public class SchemaUtil
          return this.isUnbounded() || this.maximum > 1;
       }
       
+      public boolean isOptional()
+      {
+          return this.minimum == 0 && this.maximum == 1;
+      }
+      
       public boolean isUnbounded()
       {
          return this.maximum == UNBOUNDED;
diff --git a/source/test-resources/xforms/tests/bugs/ETHREEOH-1811.xsd b/source/test-resources/xforms/tests/bugs/ETHREEOH-1811.xsd
new file mode 100644
index 0000000000..946445bc80
--- /dev/null
+++ b/source/test-resources/xforms/tests/bugs/ETHREEOH-1811.xsd
@@ -0,0 +1,103 @@
+<?xml version="1.0"?>
+<!--
+ * Copyright (C) 2005-2009 Alfresco Software Limited.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of 
+ * the GPL, you may redistribute this Program in connection with Free/Libre 
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's 
+ * FLOSS exception.  You should have recieved a copy of the text describing 
+ * the FLOSS exception, and it is also available here: 
+ * http://www.alfresco.com/legal/licensing"
+-->
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
+           xmlns:alf="http://www.alfresco.org"
+	         xmlns:article="http://www.alfresco.org/alfresco/article"
+	         targetNamespace="http://www.alfresco.org/alfresco/article"
+	         elementFormDefault="qualified">
+  
+  <!-- List of locales (languages) that articles can be created with -->
+  <xs:simpleType name="localeType">
+    <xs:restriction base="xs:normalizedString">
+      <xs:enumeration value="en_US">
+        <xs:annotation>
+          <xs:appinfo>
+            <alf:label>English (US)</alf:label>
+          </xs:appinfo>
+        </xs:annotation>
+      </xs:enumeration>
+      <xs:enumeration value="jp_JP">
+        <xs:annotation>
+          <xs:appinfo>
+            <alf:label>Japanese</alf:label>
+          </xs:appinfo>
+        </xs:annotation>
+      </xs:enumeration>
+    </xs:restriction>
+  </xs:simpleType>
+  
+  <!-- Defines the Photo complex type -->
+  <xs:complexType name="photoType">
+    <xs:sequence>
+      <xs:element name="Image"      type="xs:anyURI"           minOccurs="1" maxOccurs="1"/>
+      <xs:element name="Caption"    type="xs:normalizedString" minOccurs="0" maxOccurs="1"/>
+    </xs:sequence>
+  </xs:complexType>
+  
+  <!-- Defines the Article complex type -->
+  <xs:complexType name="articleType">
+    <xs:sequence>
+      <xs:element name="Title"    type="xs:normalizedString" minOccurs="1" maxOccurs="1" />
+      <xs:element name="Language" type="article:localeType"  minOccurs="1" maxOccurs="1">
+        <xs:annotation>
+          <xs:appinfo>
+            <alf:appearance>minimal</alf:appearance>
+          </xs:appinfo>
+        </xs:annotation>
+      </xs:element>
+      <xs:element name="Keyword"  type="xs:normalizedString" minOccurs="0" maxOccurs="unbounded" />
+      <xs:element name="Body"     type="xs:string"           minOccurs="1" maxOccurs="1" />
+      <xs:element name="Photo"    type="article:photoType"   minOccurs="0" maxOccurs="1" />
+    </xs:sequence>
+  </xs:complexType>
+  
+  <!-- Defines the Multi-lingual Article type (a set of Articles) -->
+  <xs:complexType name="multilingualArticleType">
+    <xs:sequence>
+      <xs:element name="MultilingualArticle" type="article:articleType" minOccurs="1" maxOccurs="unbounded">
+        <xs:annotation>
+          <xs:appinfo>
+            <alf:label>Article</alf:label>
+          </xs:appinfo>
+        </xs:annotation>
+        <!-- Note: these constraints aren't verified by Alfresco, but at the very least serve as useful documentation
+             on what the intended data validity rules are. --> 
+        <xs:unique name="UniqueLanguage">
+          <xs:selector xpath="article:language" />
+          <xs:field    xpath="." />
+        </xs:unique>
+        <xs:unique name="UniqueKeyword">
+          <xs:selector xpath="article:keyword" />
+          <xs:field    xpath="." />
+        </xs:unique>
+      </xs:element>
+    </xs:sequence>
+  </xs:complexType>
+
+	<!-- defines the form for creating an article -->
+  <xs:element name="article" type="article:multilingualArticleType" />
+  
+</xs:schema>
diff --git a/source/test-resources/xforms/tests/schema/optional-required.xsd b/source/test-resources/xforms/tests/schema/optional-required.xsd
new file mode 100644
index 0000000000..2b7006e7ad
--- /dev/null
+++ b/source/test-resources/xforms/tests/schema/optional-required.xsd
@@ -0,0 +1,52 @@
+<?xml version="1.0"?>
+<!--
+ * Copyright (C) 2005-2009 Alfresco Software Limited.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of 
+ * the GPL, you may redistribute this Program in connection with Free/Libre 
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's 
+ * FLOSS exception.  You should have recieved a copy of the text describing 
+ * the FLOSS exception, and it is also available here: 
+ * http://www.alfresco.com/legal/licensing"
+-->
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
+           xmlns:alf="http://www.alfresco.org"
+	         xmlns:article="http://www.alfresco.org/alfresco/article"
+	         targetNamespace="http://www.alfresco.org/alfresco/article"
+	         elementFormDefault="qualified">
+    
+  <!-- Defines the Photo complex type -->
+  <xs:complexType name="photoType">
+    <xs:sequence>
+      <xs:element name="Image" type="xs:normalizedString" minOccurs="1" maxOccurs="1" />
+      <xs:element name="Caption" type="xs:normalizedString" minOccurs="0" maxOccurs="1" />
+      <!--<xs:element name="Keywords" type="xs:anyType" minOccurs="0" />-->
+    </xs:sequence>
+  </xs:complexType>
+
+  <xs:element name="optreq">
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element name="name" type="xs:normalizedString" minOccurs="1" maxOccurs="1" />
+        <xs:element name="title" type="xs:normalizedString" minOccurs="0" maxOccurs="1" />
+        <xs:element name="keywords" type="xs:normalizedString" minOccurs="0" maxOccurs="unbounded" />
+        <xs:element name="photo" type="article:photoType" minOccurs="0" maxOccurs="1" />
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+  
+</xs:schema>