XSD for XML's with list of different and reorder types

Question

Tell me please, how can I create xsd schema, which successfully validate the following xml:
Valid XML 1

Answer 1

Try this, it works:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="start">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="list" type="list"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="list">
    <xs:sequence>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element name="typeA" type="generic" />
        <xs:element name="typeB" type="generic" />
        <xs:element name="typeC" type="generic" />
      </xs:choice>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="generic">
    <xs:sequence>
      <xs:element name="value" type="xs:string"/>
    </xs:sequence>
  </xs:complexType>
</xs:schema>