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980 bytes added ,  18:01, 12 March 2020
Initial version
== Data fields ==

A "data field" is a structured information that has at least a specific usage. For example, the "product name" field allows us to easily recognize the main name printed on the packaging.

Open Food Facts manages different kinds of data fields:
# fields that can be completed by users, such as the name of the product, the brand, etc.
# fields that are always computed by machines such as the name of the contributor or the date of the contribution
# fields that are sometimes computed based on other fields, such as the Nutri-Score, the Nova score, etc.

=== Fields completed by users ===
[to be competed]

==== Serving size ====
Serving size has specific goal: to let Open Food Facts app make a proportional calculation of each nutrient per serving size. If a candy's weight is 5 g, it can be chosen as the serving size: if these candies has 66 g of sugar per 100 g, it has about 3 g per candy.

Good:
* 60 g
* 30g

Bad:
* 30 gr
* 9 candies and 2 biscuits
* 30

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