Question5.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE students [
    <!ELEMENT students (student+)>
    <!ELEMENT student (rollno, name, address, DOB, email, phone)>
    <!ELEMENT rollno (#PCDATA)>
    <!ELEMENT name (firstName, middleName?, lastName)>
    <!ELEMENT firstName (#PCDATA)>
    <!ELEMENT middleName (#PCDATA)>
    <!ELEMENT lastName (#PCDATA)>
    <!ELEMENT address (permanent, temporary?)>
    <!ELEMENT permanent (#PCDATA)>
    <!ELEMENT temporary (#PCDATA)>
    <!ELEMENT DOB (#PCDATA)>
    <!ATTLIST DOB type (AD | BS) #REQUIRED>
    <!ELEMENT email (#PCDATA)>
    <!ELEMENT phone (#PCDATA)>
    <!ATTLIST phone type CDATA #IMPLIED>
]>
<students>
    <student>
        <rollno>12345</rollno>
        <name>
            <firstName>John</firstName>
            <lastName>Doe</lastName>
        </name>
        <address>
            <permanent>Kathmandu, Nepal</permanent>
        </address>
        <DOB type="BS">2057-02-15</DOB>
        <email>john.doe@example.com</email>
        <phone>9812345678</phone>
    </student>
</students>