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<!ELEMENT scholshipperson (studnets)+>
<!ELEMENT studnets (name,remark)>
<!ELEMENT name (order)>
<!ENTITY % na "#PCDATA">
<!ELEMENT name (%na;)>
<!ELEMENT order (#PCDATA)>
<!ELEMENT remark (#PCDATA)>
<!ENTITY % naid "#REQUIRED">
<!ELEMENT id (%naid;)>
<!ATTLIST name class CDATA #REQUIRED >







为什么无效呢？