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I'm creating an XML schema that stores information about houses. I want to store the price and the currency . It makes sense in my mind to declare this by having the currency as an attribute of the price element. Also, I want to restrict the values that can be entered as the currency to pounds, euros or dollars. EG: <price currency="euros">10000.00</price> So at the moment I'm declaring this in my XML Schema as:  <xs:element name="price"> <xs:complexType> <xs:attribute name="currency"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:enumeration value="pounds" /> <xs:enumeration value="euros" /> <xs:enumeration value="dollars" /> </xs:restriction> </xs:simpleType> </xs:attribute> </xs:complexType> </xs:element> The issue that I have with this: I'm not exactly sure if this will restrict the attribute element to pounds, euros or dollars I can't seem to specify a type on the price to a double, as I would like due to the error: Element 'price' has both a 'type' attribute and a 'anonymous type' child. Only one of these is allowed for an element. Should I just keep it simple and declare them as separate elements: <price>10000.00</price> <currency>euros</currency> ...or am I on the right path?

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