<?xml version="1.0" encoding="UTF-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://FOO" xmlns:foo="http://FOO" xmlns:bar="http://BAR" elementFormDefault="qualified"> <!-- We need to import the namespace for the schema to be valid. --> <xsd:import namespace="http://BAR"/> <xsd:element name="foo"> <xsd:complexType> <xsd:sequence> <xsd:element name="foo.B" type="bar:fooType"/> <xsd:element ref="bar:bar"/> </xsd:sequence> <xsd:attribute name="foo.attr"/> </xsd:complexType> </xsd:element> </xsd:schema>