Property talk:P1820

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Open Food Facts food additive ID
represents a food additive on Open Food Facts

Description	Food additive on Open Food Facts. A food additive can be of the form EXXX to EXXXX when it's listed by Europe, or it may not be listed by Europe. We thus have both the European name and the name of the additive in English, lower case, with hyphens. We support translations and synonyms, so we'll be able to better help enriching Wikidata and keep Open Food Fact's taxonomies more aligned with Wikidata.
Applicable "stated in" value	Open Food Facts (Q3353146)
Data type	External identifier
Domain	food additive (Q189567) (note: this should be moved to the property statements)
Allowed values	[a-z0-9-]+
Example	carmine (Q320617) → e120-cochineal Dimethyl polysiloxane (Q42807511) → e900-dimethyl-polysiloxane Sorbitol syrup (Q42807518) → e420ii-sorbitol-syrup
Source	According to this template: Open Food Facts additives ( http://world.openfoodfacts.org/additives ) which are created using a hand-curated taxonomy (http://en.wiki.openfoodfacts.org/Global_additives_taxonomy), which is regularly expanded and translated, with many synonyms in many languages. According to statements in the property: https://world.openfoodfacts.org/additives When possible, data should only be stored as statements
Formatter URL	https://world.openfoodfacts.org/additive/$1
See also	Open Food Facts food category ID (P1821), Open Food Facts ingredient ID (P5930), Open Food Facts food additive ID (P1820)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other external identifier Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Mix'n'match (Report) Database reports/Constraint violations/P1820 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 370 Main statement 366 98.9% of uses Qualifier 3 0.8% of uses Reference 1 0.3% of uses
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

Single value: this property generally contains a single value. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1820#Single value, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1820#Unique value, SPARQL (every item), SPARQL (by value)

Item “E number (P628)”: Items with this property should also have “E number (P628)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1820#Item P628, search, SPARQL

Format “[a-z0-9-]+”: value must be formatted using this pattern (PCRE syntax). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1820#Format, SPARQL

Item “has use (P366): food additive (Q189567), baking flavor (Q798358), food coloring (Q753009), flavour enhancer (Q898745), food enzyme (Q98215018), food preservative (Q6509670), antioxidant (Q133948), acidity regulator (Q898753), food stabiliser (Q7595716), raising agent (Q908833), sugar substitute (Q626292), fat substitute (Q505199), synergist (Q98637450), flour treatment agent (Q469842), glazing agent (Q334582), food foaming agent (Q60449682), antifoaming agent (Q904035), anticaking agent (Q726460), sequestrant (Q905648), humectant (Q911854), bulking agent (Q49105304), bleach (Q11587), food thickener (Q60449655), acidulant (Q337038), food emulsifier (Q60449171), carrier (Q2457003)”: Items with this property should also have “has use (P366): food additive (Q189567), baking flavor (Q798358), food coloring (Q753009), flavour enhancer (Q898745), food enzyme (Q98215018), food preservative (Q6509670), antioxidant (Q133948), acidity regulator (Q898753), food stabiliser (Q7595716), raising agent (Q908833), sugar substitute (Q626292), fat substitute (Q505199), synergist (Q98637450), flour treatment agent (Q469842), glazing agent (Q334582), food foaming agent (Q60449682), antifoaming agent (Q904035), anticaking agent (Q726460), sequestrant (Q905648), humectant (Q911854), bulking agent (Q49105304), bleach (Q11587), food thickener (Q60449655), acidulant (Q337038), food emulsifier (Q60449171), carrier (Q2457003)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1820#Item P366

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1820#Entity types

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P1820#Scope, hourly updated report, SPARQL

This property is being used by: ca:Plantilla:Identificadors química Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Pro

Property available on Mix'n Match --Teolemon (talk) 09:38, 30 April 2016 (UTC)

Constraint is not correct

For food additives the correct statement would be with has use (P366), not using instance of (P31)/subclass of (P279). The current constraints should be modified. Wostr (talk) 23:21, 26 November 2019 (UTC)

Changing datatype to external-id

I asked to change the datatype of this property from string to external-id, like two other properties of Open Food Facts project: Open Food Facts food category ID (P1821) and Open Food Facts ingredient ID (P5930). If you have any comments, write here or Wikidata:Contact_the_development_team#String_to_external-id. Wostr (talk) 11:33, 28 September 2020 (UTC)