<1.0 bug> cpp-cpa-v1_0.xsd cannot be read by Internet Explorer 5.0

It complains:
The XML page cannot be displayed Cannot view XML input using XSL style
sheet. Please correct the error and then click the Refresh button, or try
again
later. ---------------------------------------------------------------------
---------The namespace prefix is not allowed to start with the reserved
string "xml". Line 2, Position 72  <schema
targetNamespace="http://www.ebxml.org/namespaces/tradePartner"
xmlns:xml="http://www.w3.org/XML/1998/namespace"
xmlns="http://www.w3.org/2000/10/XMLSchema"
xmlns:tns="http://www.ebxml.org/namespaces/tradePartner"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"
xmlns:ds="http://www.w3.org/2000/09/xmldsig#" elementFormDefault="qualified"
attributeFormDefault="unqualified"
version="1.0">--------------------------------------------------------------
---------^XML Authority 2.2 (which provides W3C XML Schema Recommendation
support) also complainsabout a similar problem. To remove errors flagged by
XML Authority, I had to:1. Remove the clause
xmlns:xml="http://www.w3.org/XML/1998/namespace"2. Change the line<attribute
name="messageOrderSemantics" type="tns:mos.type" use="optional"
value="NotGuaranteed"/>    to<attribute name="messageOrderSemantics"
type="tns:mos.type" use="default" value="NotGuaranteed"/>