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I am getting inconsistent results from various validating parsers based on importing/including declaring an element as a simpleType that is created based on a union in a schema with no namespace. Is it possible to define a simpleType using a union and specifying memberTypes without assigning a namespace? I start with a schema with nonamespace that defines three simpleTypes the third being a union of the first two. I include this within another schema that has a namespace and then access the union type definition "usZipOrCanadaPostal" (see below). Both XSV and Xerces validate schema with this arrangement. XMLSPY also validates with no error. However, MSXML complains that it cannot find the two memberType definitions. <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="unqualified" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <xsd:simpleType name="usZip"> <xsd:restriction base="xsd:string"> <xsd:pattern value="[0-9]{5}(-[0-9]{4})?"/> </xsd:restriction> </xsd:simpleType> <xsd:simpleType name="canadaPostal"> <xsd:restriction base="xsd:string"> <xsd:pattern value="([A-Za-z]\d[A-Za-z]( |-)\d[A-Za-z]\d)"/> </xsd:restriction> </xsd:simpleType> <xsd:simpleType name="usZipOrCanadaPostal"> <xsd:union memberTypes="usZip canadaPostal"/> </xsd:simpleType> </xsd:schema> This is the schema that includes the definitions. It is considered valid in XSV, Xerces, and XMLSPY but not MSXML 4.0: <xsd:schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:ns1="http://www.test.MemberTypes" xmlns="http://www.test.MemberTypes" targetNamespace="http://www.test.MemberTypes" version="0.1" elementFormDefault="qualified"> <xsd:include schemaLocation="testComponent.xsd"/> <xsd:element name="Address" type="AddressType"/> <xsd:complexType name="AddressType"> <xsd:sequence> <xsd:element name="Name" type="xsd:string"/> <xsd:element name="Street" type="xsd:string"/> <xsd:element name="City" type="xsd:string"/> <xsd:element name="StateProvince" type="xsd:string"/> <xsd:element name="Country" type="xsd:string"/> <xsd:element name="PostalCode" type="usZipOrCanadaPostal"/> </xsd:sequence> </xsd:complexType> </xsd:schema> Also, If I alter the schema structure slightly so that I import (instead of include) the same type definitions (via a proxy schema), MSXML still returns an error, XMLSPY now returns an error of an "unidentified value for memberTypes" and XSV and Xerces continue to validate without errors. Thanks, Rick Rick Taylor XML Developer PPDM Association
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