單項(xiàng)選擇題
考慮如下的XML.Schema示例 <xs:element name=”Price”><xs:complexType><xs:attribute name=”currency”type=”xs:string”/></xs:complexType></xs:element> 屬性currency聲明等同于下面選項(xiàng)()的DTD聲明。
A.<!ATTLISTPricecurrencyCDATA#REQUIRED>
B.<!ATTLISTPricecurrencyCDATA#FIXED>
C.<!ATTLISTPricecurrencyCDATA#IMPLIED>
D.<!ATTLISTPricecurrencyPCDATA#IMPLIED>