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[[Category:Project]]
 
= Product versions and history =
 
= Product versions and history =
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* We store revisions of the product pages. Those revisions were intended for revisions of the product page itself (e.g. adding more data or fixing data corresponding to one set of product pictures), not for different versions or evolutions of the products.
 
* We store revisions of the product pages. Those revisions were intended for revisions of the product page itself (e.g. adding more data or fixing data corresponding to one set of product pictures), not for different versions or evolutions of the products.
 
** In practice, revisions mix different versions, evolutions and revisions.
 
** In practice, revisions mix different versions, evolutions and revisions.
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== Typology ==
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Not all versions are equal. In order to have a better understanding of the kind of versions that might occur, one can differentiate several type of versions:
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* Views - product versions that are essentially the same, but have different packages. Each package is intended for a different locale (country and/or language). Sometimes, this can be just a sticker that has been added. Lidl-products are a good example of this;
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* Marketing - The product (ingredients/nutritional values/etc) did not change. However the packaging evolved. Examples are Coca Cola, Perrier, etc;
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* Evolutions - In this case the product has been changed and thus the package as well;
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* Instances - the product as bought by a consumer with its own expiry date, purchase place and possibly producer-code;
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* Re-usage - In this case only the barcode is the same. The product and package has been changed; Thus is barcode is only repurposed;
    
== Solution ==
 
== Solution ==

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