Schema help

Hello All,
       I have a small doubt in XML schema,
       Is it possible to specify sequence in attribute group. Like


<xs:attributeGroup name="NEDAttributes">
<xs:sequence>
<xs:attribute name="NodeName" type="NodeName"/>
<xs:attribute name="NodeOID" type="NodeOID"/>
<xs:attribute name="NodeOID" type="NodeOID"/>
<xs:attribute name="NodeType" type="NodeType"/>
<xs:attribute name="NodeType" type="NodeType"/>
</xs:sequence>
</xs:attributeGroup>

      How to achieve this, Please can any one help me.

Thanks and Regards,
Chandu