BUGS in MS Implementation of XmlSchema:

1. Does not allow duplicate values in lists for final* and block* attributes. 
   For example "restriction restriction" is not allowed even though its a valid
   value for blockDefault.

2. Resets the minOccurs to 0 if maxOccurs="0", whereas it should raise an error.

3. Allows abstract="true" in the a localElement whereas it is not allowed.
	<?xml version="1.0"?>
	<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://xsdtesting" xmlns:x="http://xsdtesting" elementFormDefault="qualified">
		<xsd:element name="doc">
			<xsd:complexType>
				<xsd:sequence>
					<xsd:element name="elem1"/>
					<xsd:element abstract="true" name="elem2"/> <!--This element is not valid -->
				</xsd:sequence>
			</xsd:complexType>
		</xsd:element>
	</xsd:schema>