1<?xml version="1.0"?> 2<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" 3 attributeFormDefault="qualified" 4 xmlns:foo="http://FOO" 5 targetNamespace="http://FOO"> 6 7 <xsd:attribute name="id" type="xsd:ID"/> 8 9 <xsd:complexType name="typeIDAttr"> 10 <xsd:attribute ref="foo:id"/> 11 </xsd:complexType> 12 13 <xsd:simpleType name="fooID"> 14 <xsd:restriction base="xsd:ID"> 15 <xsd:pattern value="b\d{10}"/> 16 </xsd:restriction> 17 </xsd:simpleType> 18 19 <xsd:element name="foo"> 20 <xsd:complexType> 21 <xsd:complexContent> 22 <xsd:restriction base="foo:typeIDAttr"> 23 <xsd:attribute name="id" type="foo:fooID"/> 24 </xsd:restriction> 25 </xsd:complexContent> 26 </xsd:complexType> 27 </xsd:element> 28 29 30</xsd:schema>