Are the type system represented by XmlSchema and the CLS isomorphic?

Answer 1

It means every type defined by XML Schema can be defined in CLS (.NET type system) and vice versa.

For example, if we have xs:string in XML Schema, we have System.String in .NET. And If I define this class in C#:

public class Foo
{
   public string Bar{get;set;}
}

I can represent that in XML Schema:

<xs:complexType name="Foo">
    <xs:sequence>
      <xs:element name="Bar" type="xs:string" minOccurs="1" maxOccurs="1" />
    </xs:sequence>
</xs:complexType>