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2,773 bytes added ,  09:09, 23 June 2021
Delete wrong mention
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== Quantities ==
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Collecting quantity isn't so simple:
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* we can see various units
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* we can see various ways of dealing with net weight and drained weight
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* sometimes portions are well specified and sometimes not
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* we can see many ways of ordering printed data on the packages
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* ...
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=== Units ===
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...
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=== e sign ===
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The ℮ sign (for "[https://en.wikipedia.org/wiki/Estimated_sign estimated sign]") is used in Europe and other countries, at least Australia: https://www.industry.gov.au/sites/default/files/2019-04/guide-to-the-average-quantity-system.pdf (p. 12)
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 +
It seems to refer to the Average Quantity System (AQS) which is in use in Australia, Canada, European Union, India, Japan, New Zealand, South Africa and Switzerland -- source: https://www.sfa.gov.sg/docs/default-source/tools-and-resources/resources-for-businesses/avabriefingonaqsslides1 (slide 3).
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== How to enter the data ==
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For the moment, the best is to enter the data as it is printed on the product.
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== How to handle it ==
 
== How to handle it ==
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=== Logic to handle it ===
 
=== Logic to handle it ===
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...
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=== Existing libraries to parse weights and quantities ===
 
=== Existing libraries to parse weights and quantities ===
 
* https://github.com/iancanderson/ingreedy
 
* https://github.com/iancanderson/ingreedy
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**Useful to fix calorie calculation for some products
 
**Useful to fix calorie calculation for some products
 
* Calculate packaging weight by making the difference between actual weight and advertised weight
 
* Calculate packaging weight by making the difference between actual weight and advertised weight
* Calculate weight per volume for products (1dL of water is 1kg, but this changes for various products that also have a mention of their volume)
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* Calculate weight per volume for products (1dL of water is 1kg, but this changes for various products that also have a mention of their volume, e.g. milk)
 
* Some products will have multilingual weights
 
* Some products will have multilingual weights
 
** we can check that the conversion is well done if we have both values
 
** we can check that the conversion is well done if we have both values
 
** we can display the value in several metrics if we have a sanitized value in one metric
 
** we can display the value in several metrics if we have a sanitized value in one metric
   −
=== Generic approach ===
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=== Canonical approach ===
The real-world quantities for products as used by the users us a far from ideal. However it is possible to find some common approach. (At least we try here)
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The real-world quantities for products as used by the user (and printed on the packages) is not ideal. It is often impossible to parse the quantities and understand what is indicated.
* to indicate times, either a "*" or a "x" can be used;
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However it is possible to find some common approach. This is a first attempt.
* the generic formula is: multiplier * quantity size_unit for units
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* multiple formulas are distinguished by a ";"
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Some remarks:
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* product central - any quantity that is indicated is about the product and not the packaging;
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* product unit - reference may be made to a product unit, eg a cookie, a chocolate egg, etc.
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* equivalents - one or more equivalents might be available, i.e. in grams, oz or liters, 24 cookies / 6 cookies in 4 packages;
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* containers - the generic toplevel package is a container;
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* subcontainers - a container might comprise multiple subcontainers (or even subsubcontainers) [hierarchy?/taxonomy?]
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* (sub-)container synonyms - a user might container other words to describe a container, such as bottle, can, bag, etc.  [hierarchy?/taxonomy?]
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* defaults - in indicating the quantity some parts are assumed to be understood. If it states 33cl it is assumed to be about the container (the bottle) and the product (beer);
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* components - a product might consist of multiple components, which must be combined to get the product. Cf Creme brulee = vanilla cream + caramel flakes (to be heated).
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* subproduct - sometimes a subproduct quantity is indicated (net/brut, egoutté/drained);
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* verbosity - the language used in specifying quantity must be translated to a parsable format;
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* scattered - all information necessary to fill the entire quantity formula might be scattered over the package.
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* detail quantities - sometimes a detailed quantity might be present (1 biscuit weighs 23g) and a multiplier is needed to get the total weight of the package;
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* marketing - some quantities are added for marketing purposes, extra 25g;
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* subsubcontainers - an extra subdivision, eg 1 carton of yoghurt with 2 layers and 8 pots per layer;
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* servings - a quantity might contain a number of servings
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=== Generic formula ===
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Any generic quantity formula should reference the product(-name), the container and a volume or weight measure. The productname and container should (?) reference the corresponding fields.
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The quantity formula is:<br \><br \>
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<big>container_multiplier x container_name x product_multiplier x (sub_)product_name x quantity_value x quantity_unit</big>
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This formula should be valid for each container/subcontainer/subsubcontainer level, but should reflect the entire package. So one has to add multipliers and brackets where appropriate.
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For example:
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* 1 bottle of red wine comprising 70 cl (on the bottle indicated as "70 cl");
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* 1 package of granola cookies with a total weight of 276 g (just printed as 276g), which is equivalent to:
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** 1 package of 12 biscuits with a total weight of 276g, which is equivalent to:
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** 1 package of 12 biscuits with an individual weight of 23g per biscuit.
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=== Practical usage ===
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In practice however other indications are used by users. There is no best practice defined.
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* to indicate times, either a "*" or a "x" is used;
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* equivalent formulas are distinguished by a ";" or brackets "(,)"
 
** multiplier indicates how often a quantity unit is used, i.e. 6 (25 cl bottles). This is a number.
 
** multiplier indicates how often a quantity unit is used, i.e. 6 (25 cl bottles). This is a number.
 
** quantity the size of the units in size_units, i.e. 25 (size) cl (size_unit) bottles (units). This is a number.
 
** quantity the size of the units in size_units, i.e. 25 (size) cl (size_unit) bottles (units). This is a number.
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** unit is the element the numbers and sizes refer to, i.e. pot, bottle, sack, etc.
 
** unit is the element the numbers and sizes refer to, i.e. pot, bottle, sack, etc.
   −
Some remarks:
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=== Test approach ===
* not all 4 elements are always specified, eg 250 g means 1*250 g for the entire product
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* sometimes more than one quantity is specified, e.g. 250 g (5x50 g) might mean 1x250g for the entire product OR 5 50g pots
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* there are exceptions, such as multiple multipliers.
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* naturally users do not use this formal approach, but most quantities can be translated to this approach.
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Test:
   
To test this approach the examples found in France have translated to this formal approach:
 
To test this approach the examples found in France have translated to this formal approach:
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=== France ===
  −
   
{| class="wikitable sortable"
 
{| class="wikitable sortable"
 
|-
 
|-
! Quantity as stated by user !! Multiplier !! Quantity !! Size_unit !! Units
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! Quantity as stated by user !! Container multiplier !! Container name !! Product multiplier !! Product name !! Quantity value !! Quantity unit
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|-
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| 1 kg (8 pots) - [2 x (4 x 125 g)] || 8 || pots || - || - || 1 || kg
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|-
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| or || 2 x 4 || pots || - || - || 125 || g
 
|-
 
|-
| 1 kg (8 pots) - [2 x (4 x 125 g)] || - || 1 || kg || -
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| 275 g [250 g + 25 g (10 %) gratuit] || - || - || - || - || 275 || g
| || 8 || - || - || pots
   
|-
 
|-
| Emmental Coeur de Meule (28 % MG) || 275 g [250 g + 25 g (10 %) gratuit] || [http://fr.openfoodfacts.org/produit/3228023940098 (link)]
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| or || - || - || - || - || 275 + 25 || g
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|-
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| 2 * 400 g (800 g) || 2 || - || - || - || 400 || g
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|-
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| or || - || - || - || - || 800 || g
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|-
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| 4X100g || 4 || - || - || - || 100 || g
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|-
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| 2*25g || 2 || - || - || - || 25 || g
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|-
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| 200 g [160 g (2 x 8 pièces) mini-nems + 40 g sauce nuoc mâm] || - || - || - || - || 200 || g
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|-
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| or || - || - || 2x8 || mini-nems || 160 || g
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|-
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| + || - || - || - || sauce nuoc mâm || 40 || g
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|-
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| 211,5 g (9x23,5g) || - || - || -  || - || 211,5 || g
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|-
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| or || 9 || - || -  || - || 23,5 || g
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|-
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| 220g (2 unités, 2 x (60 g + 50 g)) || - || - || -  || - || 220 || g
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|-
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| or || - || - || 2  || unités || 60 + 50 || g
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|-
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| 2 x 21.5 g = 43 g || - || - || -  || - || 43 || g
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|-
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| or || 2 || - || -  || - || 21.5 || g
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|-
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|  300 g (15 biscuits de 20 g) || - || - || -  || - || 300 || g
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|-
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|  or || - || - || 15  || biscuits || 20 || g
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|-
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| 1 Litre || - || - || -  || - || 1 || litre
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|-
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| 18tranche || - || - ||  18 || tranches || - || -
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|-
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| 375 g, 30 pièces || - || - || - || - || 375 || g
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|-
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| or || - || - || 30 || pièces || - || -
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|-
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| 240 g (12 Portions) || -  || - || - || - || 240 || g
 
|-
 
|-
| Basilico || 2 * 400 g (800 g) || [http://fr.openfoodfacts.org/produit/8076809536868 (link)]
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| or || - || - || 12 || portions|| - || -
 
|-
 
|-
| Frais Malo Sucré || 4X100g || [http://fr.openfoodfacts.org/produit/3278691130017 (link)]
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| 400 g (12 à 18 bouchées )|| -  || - || - || - || 400 || g
 
|-
 
|-
| Twix || 2*25g || [http://fr.openfoodfacts.org/produit/5000159459228 (link)]
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| or || || - || 12 à 18 || bouchées || - || -
 
|-
 
|-
| 16 mini-nems Poulet, menthe, Légumes, coriandre - Précuits - Surgelés || 200 g [160 g (2 x 8 pièces) mini-nems + 40 g sauce nuoc mâm] || [http://fr.openfoodfacts.org/produit/3270160727315 (link)]
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| Poids net 190 g, poids net égoutté 140 g || - || - || - || net || 190 || g
 
|-
 
|-
| 9 barres au chocolat au lait et aux céréales || 211,5 g (9x23,5g) || [http://fr.openfoodfacts.org/produit/80176831 (link)]
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| Poids net 190 g, poids net égoutté 140 g || -  || - || - || net égoutté || 140 || g
 
|-
 
|-
| Fondant au chocolat || 220g (2 unités, 2 x (60 g + 50 g)) || [http://fr.openfoodfacts.org/produit/3184670001554 (link)]
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| contenance : 4250ml, poids net total : 4000g, poids net égoutté : 2210g ||-  || - || - || - || 4250 || ml
 
|-
 
|-
| Kinder Bueno || 2 x 21.5 g = 43 g || [http://fr.openfoodfacts.org/produit/8000500037560 (link)]
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| or ||-  || - || - || net || 4000 || g
 
|-
 
|-
| Prince Goût Chocolat || 300 g (15 biscuits de 20 g) || [http://fr.openfoodfacts.org/produit/7622210245281 (link)]
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| or  ||-  || - || - || net égoutté || 2210 || g
 
|-
 
|-
| Eau minérale Contrex || 1 Litre || [http://fr.openfoodfacts.org/produit/3179730115821 (link)]
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| 3 x [200 g (130 g net égoutté), 212 ml] || 3 || - || - || - || 200 || g
 
|-
 
|-
| Brioche Harrys Tranchée la recette Originale || 18tranche || [http://fr.openfoodfacts.org/produit/3228850003928 (link)]
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| or || 3 || - || - || - || 212 || ml
 
|-
 
|-
| FERRERO ROCHER Boîte de 30 || 375 g, 30 pièces || [http://fr.openfoodfacts.org/produit/8000500167113 (link)]
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| or || 3 || - || - || net egoutté || 130 || g
 
|-
 
|-
| Kiri® (32 % MG) à la crème de lait || 240 g (12 Portions) || [http://fr.openfoodfacts.org/produit/3073780258098 (link)]
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| 330 g (dont 180 g net), 370 mL ||-  || - || - || - || 330 || g
 
|-
 
|-
| Bouchées de Poulet à la provençale || 400 g (12 à 18 bouchées) || [http://fr.openfoodfacts.org/produit/3270160202621 (link)]
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| or |||| - || - || - || 370 || mL
 
|-
 
|-
| Thon entier au naturel || Poids net 190 g, poids net égoutté 140 g || [http://fr.openfoodfacts.org/produit/3019080067015 (link)]
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|         or ||-  || - || - || net || 180 || g
 
|-
 
|-
| Haricots beurre très fins || contenance : 4250ml, poids net total : 4000g, poids net égoutté : 2210g || [http://fr.openfoodfacts.org/produit/3112940002642 (link)]
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| 28 g - 20 dragées || || - || 20 || dragées || 28 || g
 
|-
 
|-
| Lentilles (Lot de 3 boîtes) || 3 x [200 g (130 g net égoutté), 212 ml] || [http://fr.openfoodfacts.org/produit/3263851355812 (link)]
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| 260 g (26 portions de 10 g) || -  || - || - || - || 260 || g
 
|-
 
|-
| Délices du Potager - Mini poireaux || 330 g (dont 180 g net), 370 mL || [http://fr.openfoodfacts.org/produit/3459223171337 (link)]
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| 130 g pour 20 galettes || - || - || 20 || galettes || 130 || g
 
|-
 
|-
| Chewing Gum Hollywood || 28 g - 20 dragées || [http://fr.openfoodfacts.org/produit/30034105 (link)]
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| 280 ml - 310 g || -  || - || - ||- || 280 || ml
 
|-
 
|-
| Fruit d'Or pro-activ® (35% MG) Tartine 260 g - Unilever || 260 g (26 portions de 10 g) || [http://fr.openfoodfacts.org/produit/8712100408359 (link)]
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| or || - -  || - || - ||- || 310 || g
 
|-
 
|-
| Galettes, tout au beurre || 130 g pour 20 galettes || [http://fr.openfoodfacts.org/produit/3023470001015 (link)]
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| 25 sachets || 25 || sachets || - || - || - || -
 
|-
 
|-
| Ketchup P'tits Heinz || 280 ml - 310 g || [http://fr.openfoodfacts.org/produit/8715700033235 (link)]
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| 220 g (1 personne) || - || - || - || - || 220 || g
 
|-
 
|-
| Original Earl Grey || 25 sachets || [http://fr.openfoodfacts.org/produit/0070177052706 (link)]
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| 128 g (16 bâtonnets de 2 cubes) || -  || - || 16 || bâtonnets || 128 || g
 
|-
 
|-
| Cappellettis Tofu, Epinards Bio - 220 g - Céréal Bio || 220 g (1 personne) || [http://fr.openfoodfacts.org/produit/3175681061460 (link)]
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| or || - || - || 16x2 || cubes || 128 || g
 
|-
 
|-
| KUB ® Or || 128 g (16 bâtonnets de 2 cubes) || [http://fr.openfoodfacts.org/produit/7613033586101 (link)]
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| 12 (calibre Moyen => 53 à 63 g) || - || - || 12 || calibre moyen || 53 à 63 || g
 
|-
 
|-
| Oeufs de poules Elevées en Plein Air (x 12) calibre Moyen - Carrefour || 12 (calibre Moyen => 53 à 63 g) || [http://fr.openfoodfacts.org/produit/3270190205685 (link)]
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| 8 sachets de 4 || 8 || sachets || 4 || - || - || -
 
|-
 
|-
| Belvita sablé lait || 8 sachets de 4 || [http://fr.openfoodfacts.org/produit/3017760307499 (link)]
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| 400 g, 425 ml (3 douzaines) || - || - || 3x12 || - || 400 || g
 
|-
 
|-
| Escargots de Bourgogne Extra Gros - 400 g - E || 400 g, 425 ml (3 douzaines) || [http://fr.openfoodfacts.org/produit/3459222677281 (link)]
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| 400 g, 425 ml (3 douzaines) || - || - || 3x12 || - || 425 || ml
 
|-
 
|-
| nestle || 228g (4x57g) / 48 cl (4x12cl) || [http://fr.openfoodfacts.org/produit/2000000003897 (link)]
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| 228g (4x57g) / 48 cl (4x12cl)
 
|}
 
|}
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| nestle || 228g (4x57g) / 48 cl (4x12cl) || [http://fr.openfoodfacts.org/produit/2000000003897 (link)]
 
| nestle || 228g (4x57g) / 48 cl (4x12cl) || [http://fr.openfoodfacts.org/produit/2000000003897 (link)]
 
|}
 
|}
 
+
[[Category:OCR]]
 
[[Category:ProductOpener]]
 
[[Category:ProductOpener]]

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