<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Collection [
        <!ELEMENT Collection (Description,Recipe+)>
        <!ELEMENT Description (#PCDATA)>
        <!ELEMENT Recipe (Title,Ingredients,Preparation,Comment,Nutrients)>
        <!ELEMENT Title (#PCDATA)>
        <!ELEMENT Ingredients (Ingredient+)>
        <!ELEMENT Ingredient EMPTY>
            <!ATTLIST Ingredient name CDATA #REQUIRED>
            <!ATTLIST Ingredient qty CDATA #REQUIRED>
            <!ATTLIST Ingredient unit CDATA #REQUIRED>
        <!ELEMENT Preparation (Step+)>
        <!ELEMENT Step (#PCDATA)>
        <!ELEMENT Comment (#PCDATA)>
        <!ELEMENT Nutrients EMPTY>
            <!ATTLIST Nutrients proteins CDATA #REQUIRED>
            <!ATTLIST Nutrients carbs CDATA #REQUIRED>
            <!ATTLIST Nutrients fat CDATA #REQUIRED>
            <!ATTLIST Nutrients vitamins CDATA #REQUIRED>
            <!ATTLIST Nutrients calories CDATA #REQUIRED>
        ]>
<Collection>
    <Description></Description>
    <Recipe>
        <Title></Title>
        <Ingredients>
            <Ingredient name="" qty="" unit=""/>
            <Ingredient name="" qty="" unit=""/>
        </Ingredients>
        <Preparation>
            <Step></Step>
        </Preparation>
        <Comment></Comment>
        <Nutrients proteins="" carbs="" fat="" vitamins="" calories=""/>
    </Recipe>
</Collection>