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==Project Ingredients/products ontology ==
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== Introduction ==
=== Introduction ===
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== Why? ==
=== Why? ===
   
Why do we need an ingredients ontology? The ontology describes how ingredients are derived from each other and how ingredients can be combined into new ingredients. An ontology might be useful to:
 
Why do we need an ingredients ontology? The ontology describes how ingredients are derived from each other and how ingredients can be combined into new ingredients. An ontology might be useful to:
 
* find hidden ingredients - an ingredient might contain hidden ingredients, the ontology might reveal these. For example [https://world.openfoodfacts.org/ingredient/butter butter] contains [https://world.openfoodfacts.org/ingredient/butterfat butterfat].
 
* find hidden ingredients - an ingredient might contain hidden ingredients, the ontology might reveal these. For example [https://world.openfoodfacts.org/ingredient/butter butter] contains [https://world.openfoodfacts.org/ingredient/butterfat butterfat].
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* show ingredient incompleteness - often an ingredient is incomplete defined in an ingredient list. For instance if an ingredient-list specifies [https://world.openfoodfacts.org/ingredient/milk milk], it should be defined from which mammal the milk comes from, for instance [https://world.openfoodfacts.org/ingredient/cow-s-milk cow's milk].
 
* show ingredient incompleteness - often an ingredient is incomplete defined in an ingredient list. For instance if an ingredient-list specifies [https://world.openfoodfacts.org/ingredient/milk milk], it should be defined from which mammal the milk comes from, for instance [https://world.openfoodfacts.org/ingredient/cow-s-milk cow's milk].
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=== Theory ===
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== Theory ==
 
What theory can be used to base an food ingredients taxonomy on? Is there already a food ontology somewhere?
 
What theory can be used to base an food ingredients taxonomy on? Is there already a food ontology somewhere?
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=== Relationships ===
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== Nodes ==
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Each node in the ontology is an ingredient, as is found in ingredient lists of food products.
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== Relationships ==
 
The following relationship types can be used to described how  
 
The following relationship types can be used to described how  
 
* contains - describes if an ingredient contains other ingredients. If possible the fraction/percentage/range can be added;
 
* contains - describes if an ingredient contains other ingredients. If possible the fraction/percentage/range can be added;
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