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<!ELEMENT cookBook (recipe+)>
<!ELEMENT recipe (head?, (ingredientList|procedure|para)*) >
<!ATTLIST recipe serves CDATA #IMPLIED>
<!ELEMENT head (#PCDATA) >
<!ELEMENT ingredientList (ingredient+)>
<!ELEMENT ingredient (#PCDATA|food|quantity)* >
<!ELEMENT procedure (step+) >
<!ELEMENT food (#PCDATA)>
<!ATTLIST food
type (veg|prot|fat|sugar|flavour|unspec) "unspec"
calories (high|medium|low|none|unknown) "unknown" >
<!ELEMENT quantity EMPTY >
<!ATTLIST quantity value CDATA #REQUIRED
units CDATA #IMPLIED
exact (Y|N) "N">
<!ELEMENT para (#PCDATA|food)*>
<!ELEMENT step (#PCDATA|food)*>
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