1<?xml version="1.0"?> 2<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://xsdtesting" xmlns:x="http://xsdtesting" elementFormDefault="qualified"> 3 <xsd:complexType name="base"> 4 <xsd:choice> 5 <xsd:element name="e1" block="#all"/> 6 <xsd:element name="e3" block="substitution extension restriction"/> 7 <xsd:element name="e4" block="#all"/> 8 </xsd:choice> 9 </xsd:complexType> 10 <xsd:complexType name="testing"> 11 <xsd:complexContent> 12 <xsd:restriction base="x:base"> 13 <xsd:choice> 14 <xsd:element name="e1" block="substitution extension restriction"/> 15 <xsd:element name="e3" block="substitution extension restriction"/> 16 <xsd:element name="e4" block="#all"/> 17 </xsd:choice> 18 </xsd:restriction> 19 </xsd:complexContent> 20 </xsd:complexType> 21 <xsd:element name="doc" type="x:testing"/> 22</xsd:schema> 23