Hi everyone, Is it true that key/keyref does not validate with recursion? I have this question because that when I validate the following xml file, the validation of an element defined with recursion doesn't work. Following is xml and the corresponding xsd file. (I validate xml file with Eclipse and the xerces plug-in is org.apache.xerces_2.9.0.v200805270400). Thanks in advance! Toan. xsd file : <?xml version="1.0" encoding="ISO-8859-1"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <xsd:element name="CompositeType" type="CompositeType" /> <xsd:element name="Model" type="Model"> <!-- CompositeTypeKey/KeyRef --> <xsd:key name="CompositeTypeKey"> <xsd:selector xpath=".//CompositeType" /> <xsd:field xpath="./typeName" /> </xsd:key> <xsd:keyref name="CompositeTypeRef" refer="CompositeTypeKey"> <xsd:selector xpath=".//Attribute/CompositeTypeReference" /> <xsd:field xpath="." /> </xsd:keyref> </xsd:element> <xsd:complexType name="CompositeType"> <xsd:sequence> <xsd:element minOccurs="0" name="typeName" type="xsd:string" /> <xsd:element maxOccurs="unbounded" minOccurs="0" name="Attribute" type="Attribute" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="Attribute"> <xsd:sequence> <xsd:element minOccurs="0" name="name" type="xsd:string" /> <xsd:choice minOccurs="1"> <xsd:element minOccurs="1" maxOccurs="1" name="CompositeType" type="CompositeType" /> <xsd:element minOccurs="1" maxOccurs="1" name="CompositeTypeReference" type="xsd:string" /> </xsd:choice> </xsd:sequence> </xsd:complexType> <xsd:complexType name="Model"> <xsd:sequence> <xsd:element maxOccurs="unbounded" minOccurs="0" name="CompositeType" type="CompositeType" /> </xsd:sequence> </xsd:complexType> </xsd:schema> xml file : <?xml version="1.0" encoding="ISO-8859-1" standalone="no"?> <Model xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="test.xsd" > <CompositeType> <typeName>Bozo</typeName> </CompositeType> <CompositeType> <typeName>MyData</typeName> <Attribute> <name>b</name> <CompositeTypeReference>Bozo</CompositeTypeReference> </Attribute> <Attribute> <name>d</name> <CompositeType> <typeName>CustomData</typeName> </CompositeType> </Attribute> <Attribute> <name>n</name> <CompositeType> <typeName>NewData</typeName> <Attribute> <name>m</name> <CompositeTypeReference>My</CompositeTypeReference> </Attribute> <Attribute> <name>c</name> <CompositeTypeReference>Custom</CompositeTypeReference> </Attribute> </CompositeType> </Attribute> </CompositeType> </Model> Notice that when validate if the validation of recursion works, there will be two errors at : <CompositeTypeReference>My</CompositeTypeReference> <CompositeTypeReference>Custom</CompositeTypeReference> because the right references are : <CompositeTypeReference>MyData</CompositeTypeReference> <CompositeTypeReference>CustomData</CompositeTypeReference> New Email names for you! Get the Email name you've always wanted on the new @ymail and @rocketmail. Hurry before someone else does! http://mail.promotions.yahoo.com/newdomains/aa/