?? student.dtd
字號:
<!ELEMENT university (accountdata)+>
<!ELEMENT class (teacher,student)>
<!ELEMENT teacher (teachername,lession)>
<!ELEMENT teachername (#PCDATA)>
<!ELEMENT lession (#PCDATA)>
<!ELEMENT student (studentname,sex)>
<!ELEMENT studentname (#PCDATA)>
<!ELEMENT sex (#PCDATA)>
<!ATTLIST teacher
id ID #REQUIRED
charge CDATA #IMPLIED>
<!ATTLIST lession id ID #REQUIRED>?? 快捷鍵說明
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