PPT Slide
<!ELEMENT BookCatalogue (Book)*>
<!ELEMENT Book (Title, Author, Date, ISBN, Publisher)>
<!ELEMENT Title (#PCDATA)>
<!ELEMENT Author (#PCDATA)>
<!ELEMENT Date (#PCDATA)>
<!ELEMENT ISBN (#PCDATA)>
<!ELEMENT Publisher (#PCDATA)>
XML is made up of a hierarchy of ‘elements’
BookCatalogue comprises of 0..* Books
Book comprises of 5 children
PCDATA contains parsed character data or text
Could use ‘+’ for 1..*, or ? for once or not at all