<!ELEMENT data (item)+>
<!ELEMENT item (name, birthday, birthPlace, favouriteColor, mainInterest?, comments?)>
<!ATTLIST item
	id ID #REQUIRED
>
<!ELEMENT name (#PCDATA)>
<!ELEMENT birthday (#PCDATA)>
<!ELEMENT birthPlace (#PCDATA)>
<!ELEMENT favouriteColor (#PCDATA)>
<!ELEMENT comments (#PCDATA)>
<!ELEMENT mainInterest (#PCDATA)>
