creating XML schema with restrictions

[baskarpr]

HI,
I am a beginner in XML schema. In XML schema(XSD) how to complex type, which is restricted to base64Binary (the value of base64Binary type should be any of the values from enumeration) ?
I have tried the below, but has some error, saying unexpected child element xs:enumeration. ( I am using altova's XML spy).

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexType name="Norwegian_customer">
<xs:complexContent>
<xs:restriction base="xs:base64Binary">
<xs:enumeration value="R0lGODlhcgGSALMAAAQCAEMmCZtuMFQxDS8b"/>
<xs:enumeration value="R0lGODlhcgGSALMAAAQCAEMmCZtuMFQxDS8x"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:schema>

[jkmyoung]

What you are defining seems to be a simpleType, not a complexType.