對(duì)于XML文檔實(shí)例片段<img height="”50”" width="”50”/" />,最恰當(dāng)?shù)拿枋銎浣Y(jié)構(gòu)的DTD片段是。()
A.a) B.b) C.c) D.d)
A.empty B.required C.optional D.fixed E.prohibited
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>