<xs:schema targetNamespace=“example.net/xmlschema2

xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://example.net/xmlschema2"
elementFormDefault="qualified" attributeFormDefault="unqualified">

<xs:simpleType name=“tfoo”>

<xs:restriction base="xs:NMTOKEN">
  <xs:maxLength value="2"/>
</xs:restriction>

</xs:simpleType>

</xs:schema>