Global attribute vs. simpleType

Hi,

Is there a practical difference between a reference to a global
attribute and the use of a simpleType? Only thing I can see is that the
ref forces the name of the attribute.


<xs:element name="myroot">
	<xs:complexType>
		<xs:attribute name="fooble" type="foober"/>
		<xs:attribute ref="fibber"/>
	</xs:complexType>
</xs:element>
<xs:attribute name="fibber">
	<xs:simpleType>
		<xs:restriction base="xs:string"/>
	</xs:simpleType>
</xs:attribute>
<xs:simpleType name="foober">
	<xs:restriction base="xs:string"/>
</xs:simpleType>
Rich Adili