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Basing Complex Types on Complex Types

Declaring an Element of Complex Type File: Schema.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"   targetNamespace="http://www.rntsoft.com" xmlns="http://www.rntsoft.com"   elementFormDefault="qualified">   <xsd:complexType name="characteristicsType">     <xsd:sequence>       <xsd:element name="weight" type="xsd:string" />       <xsd:element name="length" type="xsd:string" />     </xsd:sequence>       <xsd:attribute name="kind" type="xsd:string" />   </xsd:complexType>   <xsd:complexType name="birthType">     <xsd:complexContent>       <xsd:extension base="characteristicsType">         <xsd:sequence>           <xsd:element name="mother" type="xsd:string" />           <xsd:element name="birthdate" type="xsd:date" />         </xsd:sequence>       </xsd:extension>     </xsd:complexContent>   </xsd:complexType>   <xsd:element name="birth_characteristics" type="birthType" /> </xsd:schema>   File: Data.xml <?xml version="1.0"?> <birth_characteristics xmlns="http://www.rntsoft.com" kind="normal">   <weight>2-3 pounds</weight>   <length>18-24 inches</length>   <mother>Abcde</mother>   <birthdate>1999-06-10</birthdate> </birth_characteristics>