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Simple Content
A complex type that specifies simple content provides the ability to extend simple types, and to add attribute types to what might otherwise be a simple type. If the complex type is a restriction of another complex type, attribute types might be removed instead. The following complex type specifies that a priceType, which specifies a floating point number, has an attribute type that determines the currency units.
<xsd:complexType name="priceType">
<xsd:simpleContent>
<xsd:extension base="xsd:float">
<xsd:attribute name="currency"
type="xsd:token"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
An element type whose structure type is priceType might look like the following element:
<xsd:element name="price" type="priceType"/>
Given the preceding element type, the following element is valid in an XML instance:
<price currency="U S Dollars">38.00</price>