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532 bytes added ,  11:07, 1 September 2021
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'''Open Food Facts''' uses '''global taxonomies''' for fields such as '''categories''', '''brands''', '''labels''' and '''countries'''. This page explains how taxonomies work in Open Food Facts and how they can be updated and enhanced.
 
'''Open Food Facts''' uses '''global taxonomies''' for fields such as '''categories''', '''brands''', '''labels''' and '''countries'''. This page explains how taxonomies work in Open Food Facts and how they can be updated and enhanced.
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== Quick presentation ==
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[https://docs.google.com/presentation/d/1zL2fA3d_fuPvKKKmCGJ5aV_Ug-R-gXQbwSCcxf3dbo4/edit?usp=sharing Quick presentation of the taxonomies]
    
== Features ==
 
== Features ==
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* Which standard is used for the codes?  It can be the [https://en.wikipedia.org/wiki/ISO_639-1 ISO-639-1] standard, eventually this can be extended the 3-letter codes.
 
* Which standard is used for the codes?  It can be the [https://en.wikipedia.org/wiki/ISO_639-1 ISO-639-1] standard, eventually this can be extended the 3-letter codes.
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===== Singular or plural? =====
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==== Singular or plural? ====
 
Generally, we use the plural for categories but some of them are in singular. We don't put the plural form when it has a different meaning. For example Beef and Beefs. We are talking of the meat and not the animal, so there is no "s". But "Rillettes" in french (and others languages) doesn't have a singular form.
 
Generally, we use the plural for categories but some of them are in singular. We don't put the plural form when it has a different meaning. For example Beef and Beefs. We are talking of the meat and not the animal, so there is no "s". But "Rillettes" in french (and others languages) doesn't have a singular form.
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=== Taxonomy architecture ===
 
=== Taxonomy architecture ===
 
The taxonomy is not a strict hierarchy: values can have multiple parents. But cycles are not allowed.
 
The taxonomy is not a strict hierarchy: values can have multiple parents. But cycles are not allowed.
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=== Finding new opportunities for taxonomization ===
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* A good trick to find candidates for taxonomization is
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  * https://world.openfoodfacts.org/categories?filter=-
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  * https://world.openfoodfacts.org/labels?filter=-
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  * https://world.openfoodfacts.org/origins?filter=-
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  * https://world.openfoodfacts.org/ingredients?filter=-
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* Everything in italics is up for grabs
    
== Format ==
 
== Format ==

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