database.xml

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="database.xsl"?>
<!DOCTYPE database
[
    <!ELEMENT database (books,readers,borrows)>
    <!ELEMENT books (book+)>
    <!ATTLIST book id CDATA #REQUIRED>
    <!ELEMENT book (title,author)>
    <!ELEMENT title (#PCDATA)>
    <!ELEMENT author (#PCDATA)>
    <!ELEMENT readers (reader+)>
    <!ATTLIST reader id CDATA #REQUIRED>
    <!ELEMENT reader (name,lastname,address)>
    <!ELEMENT name (#PCDATA)>
    <!ELEMENT lastname (#PCDATA)>
    <!ELEMENT address (#PCDATA)>
    <!ELEMENT borrows (borrow+)>
    <!ATTLIST borrow id CDATA #REQUIRED>
    <!ELEMENT borrow (startdate,enddate)>
    <!ATTLIST borrow reader IDREF #REQUIRED>
    <!ATTLIST borrow book IDREF #REQUIRED>
    <!ELEMENT startdate (#PCDATA)>
    <!ELEMENT enddate (#PCDATA)>
]>

<database>
    <books>
        <book id="Book1">
            <title>Papierowy Mag</title>
            <author>Holmberg</author>
        </book>
        <book id="Book2">
            <title>Szklany Mag</title>
            <author>Holmberg</author>
        </book>
        <book id="Book3">
            <title>Mitologia Nordycka</title>
            <author>Gaiman</author>
        </book>
        <book id="Book4">
            <title>Amerykanscy Bogowie</title>
            <author>Gaiman</author>
        </book>
        <book id="Book5">
            <title>Eragon</title>
            <author>Paolini</author>
        </book>
        <book id="Book6">
            <title>Silmarilion</title>
            <author>Tolkien</author>
        </book>
    </books>
    <readers>
        <reader id="Reader1">
            <name>Jan</name>
            <lastname>Nowak</lastname>
            <address>Warszawa</address>
        </reader>
        <reader id="Reader2">
            <name>Michał</name>
            <lastname>Czajkowski</lastname>
            <address>Kielce</address>
        </reader>
        <reader id="Reader3">
            <name>Marcin</name>
            <lastname>Chodorek</lastname>
            <address>Nieskurzów Stary</address>
        </reader>
        <reader id="Reader4">
            <name>Adam</name>
            <lastname>Kowalski</lastname>
            <address>Kraków</address>
        </reader>
        <reader id="Reader5">
            <name>Adam</name>
            <lastname>Małysz</lastname>
            <address>Zakopane</address>
        </reader>
    </readers>
    <borrows>
        <borrow id="Borrow1" reader="Reader2" book="Book3">
            <startdate>04/01/2021</startdate>
            <enddate>04/02/2021</enddate>
        </borrow>
        <borrow id="Borrow2" reader="Reader1" book="Book2">
            <startdate>10/01/2021</startdate>
            <enddate>10/02/2021</enddate>
        </borrow>
        <borrow id="Borrow3" reader="Reader4" book="Book1">
            <startdate>28/12/2020</startdate>
            <enddate>28/01/2021</enddate>
        </borrow>
        <borrow id="Borrow4" reader="Reader3" book="Book5">
            <startdate>17/12/2020</startdate>
            <enddate>17/01/2021</enddate>
        </borrow>
        <borrow id="Borrow5" reader="Reader5" book="Book4">
            <startdate>01/01/2021</startdate>
            <enddate>01/02/2021</enddate>
        </borrow>
        <borrow id="Borrow6" reader="Reader1" book="Book1">
            <startdate>01/01/2021</startdate>
            <enddate>01/02/2021</enddate>
        </borrow>
        <borrow id="Borrow7" reader="Reader2" book="Book6">
            <startdate>02/01/2021</startdate>
            <enddate>02/02/2021</enddate>
        </borrow>
        <borrow id="Borrow8" reader="Reader5" book="Book3">
            <startdate>03/01/2021</startdate>
            <enddate>03/02/2021</enddate>
        </borrow>
        <borrow id="Borrow9" reader="Reader3" book="Book2">
            <startdate>22/01/2021</startdate>
            <enddate>22/02/2021</enddate>
        </borrow>
    </borrows>
</database>