xml文件 三种约束

<?xml version="1.0" encoding="UTF-8"?> <!ELEMENT persons (person+)> <!ELEMENT person (name,age)> <!ELEMENT name (#PCDATA)> <!ELEMENT age (#PCDATA)> <?xml version="1.0" encoding="UTF-8" ?> 洛天依 16

<person>
    <name>乐正绫</name>
    <age>15</age>
</person>

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<?xml version="1.0" encoding="UTF-8" ?>

    <!ELEMENT person (name,age)>
    <!ELEMENT name (#PCDATA)>
    <!ELEMENT age (#PCDATA)>
    ]>

伊卡洛斯 18 姆尼芙 15 玛丽 18

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<?xml version="1.0" encoding="UTF-8" ?> 欧丽娜 19 不知火舞 18