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[[Category:Fields]]
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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
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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)
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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
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Some remarks:
Some remarks:
* product central - any quantity that is indicated is about the product and not the packaging;
* 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.
* equivalents - one or more equivalents might be available, i.e. in grams, oz or liters, 24 cookies / 6 cookies in 4 packages;
* equivalents - one or more equivalents might be available, i.e. in grams, oz or liters, 24 cookies / 6 cookies in 4 packages;
* containers - the generic toplevel package is a container;
* containers - the generic toplevel package is a container;
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* marketing - some quantities are added for marketing purposes, extra 25g;
* marketing - some quantities are added for marketing purposes, extra 25g;
* subsubcontainers - an extra subdivision, eg 1 carton of yoghurt with 2 layers and 8 pots per layer;
* 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
=== Generic formula ===
=== Generic formula ===
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<big>container_multiplier x container_name x product_multiplier x (sub_)product_name x quantity_value x quantity_unit</big>
<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.
For example:
For example:
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* to indicate times, either a "*" or a "x" is used;
* to indicate times, either a "*" or a "x" is used;
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* equivalent formulas are distinguished by a ";" or brackates "(,)"
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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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| Poids net 190 g, poids net égoutté 140 g || - || - || - || net égoutté || 140 || g
| Poids net 190 g, poids net égoutté 140 g || - || - || - || net égoutté || 140 || g
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|-
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| contenance : 4250ml, poids net total : 4000g, poids net égoutté : 2210g ||- || - || - || - || 4250 || ml
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| contenance : 4250ml, poids net total : 4000g, poids net égoutté : 2210g ||
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|-
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| or ||- || - || - || net || 4000 || g
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|-
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| or ||- || - || - || net égoutté || 2210 || g
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|-
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| 3 x [200 g (130 g net égoutté), 212 ml] || 3 || - || - || - || 200 || g
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|-
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| 3 x [200 g (130 g net égoutté), 212 ml] ||
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| or || 3 || - || - || - || 212 || ml
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|-
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| 330 g (dont 180 g net), 370 mL ||
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| or || 3 || - || - || net egoutté || 130 || g
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|-
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| 28 g - 20 dragées || - || 28 || g || -
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| 330 g (dont 180 g net), 370 mL ||- || - || - || - || 330 || g
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|-
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| or || 20 || - || - || dragées
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| or ||- || - || - || - || 370 || mL
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|-
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| 260 g (26 portions de 10 g)
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| or ||- || - || - || net || 180 || g
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|-
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| 130 g pour 20 galettes || - || 130 || g || -
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| 28 g - 20 dragées || - || - || 20 || dragées || 28 || g
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|-
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| or || 20 || - || - || galettes
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| 260 g (26 portions de 10 g) || - || - || - || - || 260 || g
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|-
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| 280 ml - 310 g || - || 280 || ml || -
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| 130 g pour 20 galettes || - || - || 20 || galettes || 130 || g
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|-
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| || - || 310 || g || -
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| 280 ml - 310 g || - || - || - ||- || 280 || ml
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|-
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| 25 sachets || 25 || - || - || sachets
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| or || - - || - || - ||- || 310 || g
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|-
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| 220 g (1 personne) || - || 220 || g || -
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| 25 sachets || 25 || sachets || - || - || - || -
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|-
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| 128 g (16 bâtonnets de 2 cubes) || - || 128 || g || -
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| 220 g (1 personne) || - || - || - || - || 220 || g
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|-
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| || 16 || - || - || bâtonnets
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| 128 g (16 bâtonnets de 2 cubes) || - || - || 16 || bâtonnets || 128 || g
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|-
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| || 16x4 || - || - || cubes
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| or || - || - || 16x2 || cubes || 128 || g
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|-
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| 12 (calibre Moyen => 53 à 63 g) || 12 || - || - || calibre moyen
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| 12 (calibre Moyen => 53 à 63 g) || - || - || 12 || calibre moyen || 53 à 63 || g
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|-
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| 8 sachets de 4 || 8 || - || - || sachets
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| 8 sachets de 4 || 8 || sachets || 4 || - || - || -
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|-
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| || 8x4 || - || - || -
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| 400 g, 425 ml (3 douzaines) || - || - || 3x12 || - || 400 || g
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| 400 g, 425 ml (3 douzaines)
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| 400 g, 425 ml (3 douzaines) || - || - || 3x12 || - || 425 || ml
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| 228g (4x57g) / 48 cl (4x12cl)
| 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)]
|}
|}
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[[Category:OCR]]
[[Category:ProductOpener]]
[[Category:ProductOpener]]