diff --git a/x4o-core/src/main/java/org/x4o/xml/eld/EldModuleLoaderCore.java b/x4o-core/src/main/java/org/x4o/xml/eld/EldModuleLoaderCore.java
index f46ea95..4e92190 100644
--- a/x4o-core/src/main/java/org/x4o/xml/eld/EldModuleLoaderCore.java
+++ b/x4o-core/src/main/java/org/x4o/xml/eld/EldModuleLoaderCore.java
@@ -294,6 +294,7 @@ public class EldModuleLoaderCore implements ElementLanguageModuleLoader {
 		
 		ec = new DefaultElementClass("elementParent",null,ElementClassAddParentElement.class);
 		ec.addElementParent(CEL_CORE_URI, "element");
+		ec.addElementParent(CEL_CORE_URI, "elementInterface");
 		try {
 			attr = (ElementClassAttribute)X4OLanguageClassLoader.newInstance(elementLanguage.getLanguageConfiguration().getDefaultElementClassAttribute());
 			attr.setName("tag");
diff --git a/x4o-core/src/main/java/org/x4o/xml/eld/lang/ElementClassAddParentElement.java b/x4o-core/src/main/java/org/x4o/xml/eld/lang/ElementClassAddParentElement.java
index 0613c8d..7612b11 100644
--- a/x4o-core/src/main/java/org/x4o/xml/eld/lang/ElementClassAddParentElement.java
+++ b/x4o-core/src/main/java/org/x4o/xml/eld/lang/ElementClassAddParentElement.java
@@ -24,7 +24,7 @@
 package org.x4o.xml.eld.lang;
 
 import org.x4o.xml.element.AbstractElement;
-import org.x4o.xml.element.ElementClass;
+import org.x4o.xml.element.ElementClassBase;
 import org.x4o.xml.element.ElementException;
 
 /**
@@ -48,10 +48,10 @@ public class ElementClassAddParentElement extends AbstractElement {
 		if (namespaceUri==null) {
 			namespaceUri = getParent().getParent().getAttributes().get("uri"); // copy uri from namespace element.
 		}
-		if (getParent().getElementObject() instanceof ElementClass) {
-			((ElementClass)getParent().getElementObject()).addElementParent(namespaceUri,tag);
+		if (getParent().getElementObject() instanceof ElementClassBase) {
+			((ElementClassBase)getParent().getElementObject()).addElementParent(namespaceUri,tag);
 		} else {
-			throw new ElementException("Wrong parent class is not ElementClass but: "+getParent().getElementObject());
+			throw new ElementException("Wrong parent class is not ElementClassBase but: "+getParent().getElementObject());
 		}
 	}
 }
diff --git a/x4o-core/src/main/java/org/x4o/xml/eld/xsd/EldXsdXmlWriter.java b/x4o-core/src/main/java/org/x4o/xml/eld/xsd/EldXsdXmlWriter.java
index 7c7af6e..b997996 100644
--- a/x4o-core/src/main/java/org/x4o/xml/eld/xsd/EldXsdXmlWriter.java
+++ b/x4o-core/src/main/java/org/x4o/xml/eld/xsd/EldXsdXmlWriter.java
@@ -37,6 +37,7 @@ import org.x4o.xml.element.ElementAttributeHandler;
 import org.x4o.xml.element.ElementBindingHandler;
 import org.x4o.xml.element.ElementClass;
 import org.x4o.xml.element.ElementClassAttribute;
+import org.x4o.xml.element.ElementInterface;
 import org.x4o.xml.element.ElementLanguage;
 import org.x4o.xml.element.ElementLanguageModule;
 import org.x4o.xml.element.ElementNamespaceContext;
@@ -129,6 +130,12 @@ public class EldXsdXmlWriter {
 								}
 							}
 						}
+						for (ElementInterface ei:context.findElementInterfaces(objectClass)) {
+							List<String> eiTags = ei.getElementParents(namespaceUri);
+							if (eiTags!=null) {
+								startNamespace(nsContext.getUri(),nsContext.getSchemaPrefix());
+							}
+						}
 					}
 				}
 			}
@@ -261,9 +268,10 @@ public class EldXsdXmlWriter {
 		
 		if (ec.getSchemaContentBase()==null) {
 			atts = new AttributesImpl();
-			atts.addAttribute ("", "minOccurs", "", "", "0"); // make unordered elements
+			atts.addAttribute ("", "minOccurs", "", "", "0"); // TODO: make unordered elements
 			atts.addAttribute ("", "maxOccurs", "", "", "unbounded");
 			xmlWriter.startElement (SCHEMA_URI, "choice", "", atts);
+			
 			for (ElementLanguageModule mod:context.getElementLanguageModules()) {
 				for (ElementNamespaceContext ns:mod.getElementNamespaceContexts()) {
 					writeElementClassNamespaces(ec,nsWrite,ns);
@@ -361,27 +369,36 @@ public class EldXsdXmlWriter {
 		}
 	}
 	
-	private void writeElementClassNamespaces(ElementClass ec,ElementNamespaceContext nsWrite,ElementNamespaceContext ns) throws SAXException {
+	private void writeElementClassNamespaces(ElementClass ecWrite,ElementNamespaceContext nsWrite,ElementNamespaceContext ns) throws SAXException {
 		AttributesImpl atts = new AttributesImpl();
 		List<String> refElements = new ArrayList<String>(20);
 		for (ElementClass checkClass:ns.getElementClasses()) {
 			List<String> parents = checkClass.getElementParents(nsWrite.getUri());
-			if (parents!=null && parents.contains(ec.getTag())) {
+			if (parents!=null && parents.contains(ecWrite.getTag())) {
 				refElements.add(checkClass.getTag());
-			}
-			if (ec.getObjectClass()==null) {
 				continue;
 			}
 			if (checkClass.getObjectClass()==null) {
 				continue;
 			}
-			Class<?> objectClass = ec.getObjectClass();
+			for (ElementInterface ei:context.findElementInterfaces(checkClass.getObjectClass())) {
+				parents = ei.getElementParents(nsWrite.getUri());
+				if (parents!=null && parents.contains(ecWrite.getTag())) {
+					refElements.add(checkClass.getTag());
+					break;
+				}
+			}
+			if (ecWrite.getObjectClass()==null) {
+				continue;
+			}
+			Class<?> objectClass = ecWrite.getObjectClass();
 			Class<?> checkObjectClass = checkClass.getObjectClass();
 			List<ElementBindingHandler> b = context.findElementBindingHandlers(objectClass,checkObjectClass);
 			if (b.isEmpty()==false) {
 				refElements.add(checkClass.getTag());
 			}
 		}
+		
 		if (refElements.isEmpty()==false) {
 			Set<String> s = new HashSet<String>(refElements.size());
 			s.addAll(refElements);
diff --git a/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClass.java b/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClass.java
index 6c0f861..00fb897 100644
--- a/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClass.java
+++ b/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClass.java
@@ -40,14 +40,12 @@ public abstract class AbstractElementClass extends AbstractElementClassBase impl
 	private Class<?> objectClass = null;
 	private Class<?> elementClass = null;
 	private Boolean autoAttributes = true;
-	private Map<String,List<String>> elementParents = null;
 	private String schemaContentBase = null;
 	private Boolean schemaContentComplex = null;
 	private Boolean schemaContentMixed = null;
 	private List<String> skipPhases = null;
 	
 	public AbstractElementClass() {
-		elementParents = new HashMap<String,List<String>>(5);
 		skipPhases = new ArrayList<String>(3);
 	}
 	
@@ -107,42 +105,6 @@ public abstract class AbstractElementClass extends AbstractElementClassBase impl
 		this.autoAttributes = autoAttributes;
 	}
 
-	/**
-	 * @see org.x4o.xml.element.ElementClass#addElementParent(java.lang.String,java.lang.String)
-	 */
-	public void addElementParent(String namespaceUri,String tag) {
-		if (namespaceUri==null) {
-			throw new NullPointerException("Can't add parent tag with null namespace uri.");
-		}
-		if (namespaceUri.isEmpty()) {
-			throw new IllegalArgumentException("Can't add parent tag with empty namespace uri.");
-		}
-		List<String> tags = elementParents.get(namespaceUri);
-		if (tags==null) {
-			tags = new ArrayList<String>(5);
-			elementParents.put(namespaceUri, tags);
-		}
-		tags.add(tag);
-	}
-
-	/**
-	 * @see org.x4o.xml.element.ElementClass#removeElementParent(java.lang.String,java.lang.String)
-	 */
-	public void removeElementParent(String namespaceUri,String tag) {
-		List<String> tags = elementParents.get(namespaceUri);
-		if (tags==null) {
-			return;
-		}
-		tags.remove(tag);
-	}
-
-	/**
-	 * @see org.x4o.xml.element.ElementClass#getElementParents(java.lang.String)
-	 */
-	public List<String> getElementParents(String namespaceUri) {
-		return elementParents.get(namespaceUri);
-	}
-
 	/**
 	 * @return the schemaContentBase
 	 */
diff --git a/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClassBase.java b/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClassBase.java
index dc72fed..4f59632 100644
--- a/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClassBase.java
+++ b/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementClassBase.java
@@ -39,13 +39,14 @@ public abstract class AbstractElementClassBase extends AbstractElementMetaBase i
 
 	private Map<String,ElementClassAttribute> elementClassAttributes = null;
 	private List<ElementConfigurator> elementConfigurators = null;
+	private Map<String,List<String>> elementParents = null;
 	
 	public AbstractElementClassBase() {
 		elementConfigurators = new ArrayList<ElementConfigurator>(5);
 		elementClassAttributes = new HashMap<String,ElementClassAttribute>(15);
+		elementParents = new HashMap<String,List<String>>(5);
 	}
 	
-
 	/**
 	 * @see ElementClass#getElementConfigurators()
 	 */
@@ -77,4 +78,40 @@ public abstract class AbstractElementClassBase extends AbstractElementMetaBase i
 	public ElementClassAttribute getElementClassAttributeByName(String attributeName) {
 		return elementClassAttributes.get(attributeName);
 	}
+	
+	/**
+	 * @see org.x4o.xml.element.ElementClassBase#addElementParent(java.lang.String,java.lang.String)
+	 */
+	public void addElementParent(String namespaceUri,String tag) {
+		if (namespaceUri==null) {
+			throw new NullPointerException("Can't add parent tag with null namespace uri.");
+		}
+		if (namespaceUri.isEmpty()) {
+			throw new IllegalArgumentException("Can't add parent tag with empty namespace uri.");
+		}
+		List<String> tags = elementParents.get(namespaceUri);
+		if (tags==null) {
+			tags = new ArrayList<String>(5);
+			elementParents.put(namespaceUri, tags);
+		}
+		tags.add(tag);
+	}
+
+	/**
+	 * @see org.x4o.xml.element.ElementClassBase#removeElementParent(java.lang.String,java.lang.String)
+	 */
+	public void removeElementParent(String namespaceUri,String tag) {
+		List<String> tags = elementParents.get(namespaceUri);
+		if (tags==null) {
+			return;
+		}
+		tags.remove(tag);
+	}
+
+	/**
+	 * @see org.x4o.xml.element.ElementClassBase#getElementParents(java.lang.String)
+	 */
+	public List<String> getElementParents(String namespaceUri) {
+		return elementParents.get(namespaceUri);
+	}
 }
diff --git a/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementLanguageModule.java b/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementLanguageModule.java
index a82f3ef..fb6653c 100644
--- a/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementLanguageModule.java
+++ b/x4o-core/src/main/java/org/x4o/xml/element/AbstractElementLanguageModule.java
@@ -130,11 +130,12 @@ public abstract class AbstractElementLanguageModule extends AbstractElementMetaB
 			throw new NullPointerException("Can't add with null id property.");
 		}
 		// Check so doc tree does not loop; see EldDocHtmlWriter.findChilderen()
+		/*
 		for (Class<?> cl:elementBindingHandler.getBindChildClasses()) {
 			if (elementBindingHandler.getBindParentClass().equals(cl)) {
 				throw new IllegalStateException("Can't add binding handler: "+elementBindingHandler.getId()+" with same parent as child class.");
 			}
-		}
+		}*/
 		logger.finer("Adding ElementBindingHandler: "+elementBindingHandler);
 		elementBindingHandlers.add(elementBindingHandler);
 	}
diff --git a/x4o-core/src/main/java/org/x4o/xml/element/ElementClass.java b/x4o-core/src/main/java/org/x4o/xml/element/ElementClass.java
index 0a5da85..d3f4194 100644
--- a/x4o-core/src/main/java/org/x4o/xml/element/ElementClass.java
+++ b/x4o-core/src/main/java/org/x4o/xml/element/ElementClass.java
@@ -78,29 +78,6 @@ public interface ElementClass extends ElementClassBase {
 	 */
 	void setAutoAttributes(Boolean autoAttributes);
 	
-	/**
-	 * Add an parent element tag.
-	 * Used: for xsd only.
-	 * @param namespaceUri The namespace uri of this tag relation.
-	 * @param tag	The parent element tag.
-	 */
-	void addElementParent(String namespaceUri,String tag);
-	
-	/**
-	 * Remove and parent element
-	 * Used: for xsd only. 
-	 * @param namespaceUri The namespace uri of this tag relation.
-	 * @param tag	The parent element tag.
-	 */
-	void removeElementParent(String namespaceUri,String tag);
-	
-	/**
-	 * Returns list of parent element tags.
-	 * @param namespaceUri The namespace uri of this tag relation.
-	 * @return	The list of tags.
-	 */
-	List<String> getElementParents(String namespaceUri);
-	
 	/**
 	 * @return the schemaContentBase
 	 */
diff --git a/x4o-core/src/main/java/org/x4o/xml/element/ElementClassBase.java b/x4o-core/src/main/java/org/x4o/xml/element/ElementClassBase.java
index 612e869..294fc88 100644
--- a/x4o-core/src/main/java/org/x4o/xml/element/ElementClassBase.java
+++ b/x4o-core/src/main/java/org/x4o/xml/element/ElementClassBase.java
@@ -41,4 +41,28 @@ public interface ElementClassBase extends ElementMetaBase {
 	Collection<ElementClassAttribute> getElementClassAttributes();
 	ElementClassAttribute getElementClassAttributeByName(String attributeName);
 	void addElementClassAttribute(ElementClassAttribute elementClassAttribute);
+	
+	/**
+	 * Add an parent element tag.
+	 * Used: for xsd/doc only.
+	 * @param namespaceUri The namespace uri of this tag relation.
+	 * @param tag	The parent element tag.
+	 */
+	void addElementParent(String namespaceUri,String tag);
+	
+	/**
+	 * Remove and parent element
+	 * Used: for xsd/doc only. 
+	 * @param namespaceUri The namespace uri of this tag relation.
+	 * @param tag	The parent element tag.
+	 */
+	void removeElementParent(String namespaceUri,String tag);
+	
+	/**
+	 * Returns list of parent element tags.
+	 * Used: for xsd/doc only. 
+	 * @param namespaceUri The namespace uri of this tag relation.
+	 * @return	The list of tags.
+	 */
+	List<String> getElementParents(String namespaceUri);
 }
diff --git a/x4o-core/src/main/resources/META-INF/cel/cel-core-1.0.xsd b/x4o-core/src/main/resources/META-INF/cel/cel-core-1.0.xsd
index 29087eb..033c97e 100644
--- a/x4o-core/src/main/resources/META-INF/cel/cel-core-1.0.xsd
+++ b/x4o-core/src/main/resources/META-INF/cel/cel-core-1.0.xsd
@@ -7,7 +7,7 @@
 	ModuleName:		Core Element Languag Module
 	Namespaces:		2
 	Namespace:		http://cel.x4o.org/xml/ns/cel-core
-	Created on:		Thu Dec 20 22:30:55 CET 2012
+	Created on:		Tue Jan 08 06:02:28 CET 2013
 -->
 <schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:this="http://cel.x4o.org/xml/ns/cel-core"
@@ -44,11 +44,11 @@
 		</choice>
 		<attribute name="objectClass" type="string"/>
 		<attribute name="elementClass" type="string"/>
-		<attribute name="tag" type="string"/>
+		<attribute name="schemaContentBase" type="string"/>
 		<attribute name="autoAttributes" type="boolean"/>
 		<attribute name="schemaContentComplex" type="boolean"/>
 		<attribute name="schemaContentMixed" type="boolean"/>
-		<attribute name="schemaContentBase" type="string"/>
+		<attribute name="tag" type="string"/>
 		<attribute name="description" type="string"/>
 		<attribute name="id" type="string"/>
 	</complexType>
@@ -81,12 +81,12 @@
 			<element name="description" type="this:descriptionType"/>
 		</choice>
 		<attribute name="name" type="string"/>
-		<attribute name="required" type="boolean"/>
+		<attribute name="objectConverter" type="string"/>
 		<attribute name="runResolveEL" type="boolean"/>
 		<attribute name="runConverters" type="boolean"/>
-		<attribute name="defaultValue" type="string"/>
-		<attribute name="objectConverter" type="string"/>
 		<attribute name="runBeanFill" type="boolean"/>
+		<attribute name="required" type="boolean"/>
+		<attribute name="defaultValue" type="string"/>
 		<attribute name="description" type="string"/>
 		<attribute name="id" type="string"/>
 	</complexType>
@@ -107,6 +107,7 @@
 			<element name="bindingHandler" type="this:bindingHandlerType"/>
 			<element name="configurator" type="this:configuratorType"/>
 			<element name="description" type="this:descriptionType"/>
+			<element name="elementParent" type="this:elementParentType"/>
 		</choice>
 		<attribute name="interfaceClass" type="string"/>
 		<attribute name="description" type="string"/>
diff --git a/x4o-core/src/main/resources/META-INF/cel/cel-root-1.0.xsd b/x4o-core/src/main/resources/META-INF/cel/cel-root-1.0.xsd
index dfd34c6..3d08e60 100644
--- a/x4o-core/src/main/resources/META-INF/cel/cel-root-1.0.xsd
+++ b/x4o-core/src/main/resources/META-INF/cel/cel-root-1.0.xsd
@@ -7,7 +7,7 @@
 	ModuleName:		Core Element Languag Module
 	Namespaces:		2
 	Namespace:		http://cel.x4o.org/xml/ns/cel-root
-	Created on:		Thu Dec 20 22:30:55 CET 2012
+	Created on:		Tue Jan 08 06:02:28 CET 2013
 -->
 <schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:cel-core="http://cel.x4o.org/xml/ns/cel-core"
@@ -25,8 +25,8 @@
 			</choice>
 			<attribute name="name" type="string"/>
 			<attribute name="providerName" type="string"/>
-			<attribute name="elementLanguageModuleLoader" type="string"/>
 			<attribute name="sourceResource" type="string"/>
+			<attribute name="elementLanguageModuleLoader" type="string"/>
 			<attribute name="description" type="string"/>
 			<attribute name="id" type="string"/>
 		</complexType>
diff --git a/x4o-core/src/main/resources/META-INF/eld/eld-conv-1.0.xsd b/x4o-core/src/main/resources/META-INF/eld/eld-conv-1.0.xsd
index 380da65..ba7f45f 100644
--- a/x4o-core/src/main/resources/META-INF/eld/eld-conv-1.0.xsd
+++ b/x4o-core/src/main/resources/META-INF/eld/eld-conv-1.0.xsd
@@ -7,7 +7,7 @@
 	ModuleName:		Element Language Definition
 	Namespaces:		3
 	Namespace:		http://eld.x4o.org/xml/ns/eld-conv
-	Created on:		Thu Dec 20 22:30:10 CET 2012
+	Created on:		Tue Jan 08 06:03:20 CET 2013
 -->
 <schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:this="http://eld.x4o.org/xml/ns/eld-conv"
diff --git a/x4o-core/src/main/resources/META-INF/eld/eld-lang-1.0.xsd b/x4o-core/src/main/resources/META-INF/eld/eld-lang-1.0.xsd
index 68e48d4..742be58 100644
--- a/x4o-core/src/main/resources/META-INF/eld/eld-lang-1.0.xsd
+++ b/x4o-core/src/main/resources/META-INF/eld/eld-lang-1.0.xsd
@@ -7,7 +7,7 @@
 	ModuleName:		Element Language Definition
 	Namespaces:		3
 	Namespace:		http://eld.x4o.org/xml/ns/eld-lang
-	Created on:		Thu Dec 20 22:30:10 CET 2012
+	Created on:		Tue Jan 08 06:03:20 CET 2013
 -->
 <schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:conv="http://eld.x4o.org/xml/ns/eld-conv"
@@ -55,10 +55,10 @@
 		<attribute name="objectClass" type="string"/>
 		<attribute name="elementClass" type="string"/>
 		<attribute name="tag" type="string"/>
-		<attribute name="schemaContentBase" type="string"/>
 		<attribute name="autoAttributes" type="boolean"/>
 		<attribute name="schemaContentComplex" type="boolean"/>
 		<attribute name="schemaContentMixed" type="boolean"/>
+		<attribute name="schemaContentBase" type="string"/>
 		<attribute name="id" type="string"/>
 		<attribute name="description" type="string"/>
 	</complexType>
@@ -128,11 +128,11 @@
 		</choice>
 		<attribute name="name" type="string"/>
 		<attribute name="defaultValue" type="string"/>
+		<attribute name="required" type="boolean"/>
 		<attribute name="objectConverter" type="string"/>
 		<attribute name="runResolveEL" type="boolean"/>
 		<attribute name="runConverters" type="boolean"/>
 		<attribute name="runBeanFill" type="boolean"/>
-		<attribute name="required" type="boolean"/>
 		<attribute name="id" type="string"/>
 		<attribute name="description" type="string"/>
 	</complexType>
@@ -169,6 +169,7 @@
 			<element name="classBindingHandler" type="this:classBindingHandlerType"/>
 			<element name="configurator" type="this:configuratorType"/>
 			<element name="description" type="this:descriptionType"/>
+			<element name="elementParent" type="this:elementParentType"/>
 		</choice>
 		<attribute name="id" type="string" use="required"/>
 		<attribute name="interfaceClass" type="string" use="required"/>
@@ -177,7 +178,7 @@
 	<complexType name="elementParentType">
 		<choice minOccurs="0" maxOccurs="unbounded"/>
 		<attribute name="tag" type="string"/>
-		<attribute name="namespaceUri" type="string"/>
+		<attribute name="uri" type="string"/>
 		<anyAttribute/>
 	</complexType>
 	<element name="namespace" type="this:namespaceType">
diff --git a/x4o-core/src/main/resources/META-INF/eld/eld-lang.eld b/x4o-core/src/main/resources/META-INF/eld/eld-lang.eld
index a116097..72d6227 100644
--- a/x4o-core/src/main/resources/META-INF/eld/eld-lang.eld
+++ b/x4o-core/src/main/resources/META-INF/eld/eld-lang.eld
@@ -180,11 +180,12 @@
 		<element tag="elementParent"						elementClass="org.x4o.xml.eld.lang.ElementClassAddParentElement">
 			<description>Adds an parent element tag for xsd</description>
 			<elementParent tag="element"/>
+			<elementParent tag="elementInterface"/>
 			<attribute name="tag">
 				<description>The parent tag to have object for.</description>
 			</attribute>
-			<attribute name="namespaceUri">
-				<description>The element namespace uri if non local.</description>
+			<attribute name="uri">
+				<description>The element namespace uri if non local parent.</description>
 			</attribute>
 		</element>
 		
diff --git a/x4o-core/src/main/resources/META-INF/eld/eld-root-1.0.xsd b/x4o-core/src/main/resources/META-INF/eld/eld-root-1.0.xsd
index 05ccba1..b08851f 100644
--- a/x4o-core/src/main/resources/META-INF/eld/eld-root-1.0.xsd
+++ b/x4o-core/src/main/resources/META-INF/eld/eld-root-1.0.xsd
@@ -7,7 +7,7 @@
 	ModuleName:		Element Language Definition
 	Namespaces:		3
 	Namespace:		http://eld.x4o.org/xml/ns/eld-root
-	Created on:		Thu Dec 20 22:30:10 CET 2012
+	Created on:		Tue Jan 08 06:03:20 CET 2013
 -->
 <schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:conv="http://eld.x4o.org/xml/ns/eld-conv"
@@ -30,8 +30,8 @@
 			<attribute name="id" type="string" use="required"/>
 			<attribute name="name" type="string"/>
 			<attribute name="providerName" type="string"/>
-			<attribute name="elementLanguageModuleLoader" type="string"/>
 			<attribute name="sourceResource" type="string"/>
+			<attribute name="elementLanguageModuleLoader" type="string"/>
 			<attribute name="description" type="string"/>
 		</complexType>
 	</element>
diff --git a/x4o-core/src/test/resources/META-INF/test/test-lang.eld b/x4o-core/src/test/resources/META-INF/test/test-lang.eld
index f1b6756..cc08648 100644
--- a/x4o-core/src/test/resources/META-INF/test/test-lang.eld
+++ b/x4o-core/src/test/resources/META-INF/test/test-lang.eld
@@ -46,6 +46,12 @@
 	<eld:classBindingHandler id="Root-Bean"		parentClass="org.x4o.xml.test.models.TestObjectRoot" childClass="org.x4o.xml.test.models.TestBean" method="addTestBean">
 		<eld:description>Binds the TestBean to the TestObjectRoot</eld:description>
 	</eld:classBindingHandler>
+	<eld:classBindingHandler id="JComponent-JComponent"	parentClass="javax.swing.JComponent" childClass="javax.swing.JComponent" method="addComponent">
+		<eld:description>Binds j components.</eld:description>
+	</eld:classBindingHandler>
+	<eld:classBindingHandler id="JFrame-JPanel"	parentClass="javax.swing.JFrame" childClass="javax.swing.JPanel" method="add">
+		<eld:description>Binds panel to frame components as unit check.</eld:description>
+	</eld:classBindingHandler>
 	
 	<eld:elementInterface id="Component" interfaceClass="java.awt.Component">
 		<eld:description>Configs the Component based objects.</eld:description>
@@ -132,7 +138,9 @@
 			-->
 		</eld:element>
 			
-		<eld:element tag="JFrame"				objectClass="javax.swing.JFrame"/>
+		<eld:element tag="JFrame"				objectClass="javax.swing.JFrame">
+			<eld:elementParent tag="root" uri="http://test.x4o.org/xml/ns/test-root"/> 
+		</eld:element>
 		<eld:element tag="JFrameContentPane"	elementClass="org.x4o.xml.test.element.ContentPaneElement"/>
 		<eld:element tag="JLabel"				objectClass="javax.swing.JLabel"/>
 		<eld:element tag="JPanel"				objectClass="javax.swing.JPanel"/>
diff --git a/x4o-elddoc/src/main/java/org/x4o/xml/eld/doc/EldDocHtmlWriter.java b/x4o-elddoc/src/main/java/org/x4o/xml/eld/doc/EldDocHtmlWriter.java
index 381c843..9111347 100644
--- a/x4o-elddoc/src/main/java/org/x4o/xml/eld/doc/EldDocHtmlWriter.java
+++ b/x4o-elddoc/src/main/java/org/x4o/xml/eld/doc/EldDocHtmlWriter.java
@@ -298,7 +298,6 @@ public class EldDocHtmlWriter {
 		if (node.indent>20) {
 			return result; // hard fail limit
 		}
-		
 		for (ElementLanguageModule mod:node.context.getElementLanguageModules()) {
 			for (ElementNamespaceContext ns:mod.getElementNamespaceContexts()) {
 				for (ElementClass ec:ns.getElementClasses()) {
@@ -313,7 +312,25 @@ public class EldDocHtmlWriter {
 						n.indent=node.indent+1;
 						n.parent=node;
 					} else {
-						if (node.elementClass.getObjectClass()==null | ec.getObjectClass()==null) {
+						if (ec.getObjectClass()==null) {
+							continue;
+						}
+						// Check interfaces of child , and see if parent tag is there.
+						for (ElementInterface ei:node.context.findElementInterfaces(ec.getObjectClass())) {
+							List<String> eiTags = ei.getElementParents(node.namespace.getUri());
+							if (eiTags!=null && eiTags.contains(node.elementClass.getTag())) {
+								n = new TreeNode();
+								n.context=node.context;
+								n.module=mod;
+								n.namespace=ns;
+								n.elementClass=ec;
+								n.indent=node.indent+1;
+								n.parent=node;
+								break;
+							}
+						}
+						
+						if (node.elementClass.getObjectClass()==null) {
 							continue;
 						}
 						List<ElementBindingHandler> binds = node.context.findElementBindingHandlers(node.elementClass.getObjectClass(), ec.getObjectClass());
@@ -372,7 +389,25 @@ public class EldDocHtmlWriter {
 					}
 				}
 				for (ElementClass ec:ns.getElementClasses()) {
-					if (node.elementClass.getObjectClass()==null | ec.getObjectClass()==null) {
+					if (ec.getObjectClass()==null) {
+						continue;
+					}
+					// Check interfaces of child , and see if parent tag is there.
+					for (ElementInterface ei:node.context.findElementInterfaces(ec.getObjectClass())) {
+						List<String> eiTags = ei.getElementParents(node.namespace.getUri());
+						if (eiTags!=null && eiTags.contains(node.elementClass.getTag())) {
+							n = new TreeNode();
+							n.context=node.context;
+							n.module=mod;
+							n.namespace=ns;
+							n.elementClass=ec;
+							n.indent=node.indent+1;
+							n.parent=node;
+							result.add(n);
+							break;
+						}
+					}
+					if (node.elementClass.getObjectClass()==null) {
 						continue;
 					}
 					List<ElementBindingHandler> binds = node.context.findElementBindingHandlers(ec.getObjectClass(),node.elementClass.getObjectClass());