Hello Abe and welcome! I'm working on inventaire.io, which might be the closest existing thing to what you're describing: for the needs of the book sharing webapp, we maintain an open bibliographic database using Wikidata vocabulary and extending Wikidata <https://wiki.inventaire.io/wiki/Data?lang=en> for entries that don't match the notability requirements and/or were automatically generated from data found on the web and that couldn't be reconciled with existing entities on Wikidata. We build edition data primarily around ISBNs, which are part of GTINs. This wasn't built using Wikibase but with an *ad hoc* software (see repo <http://github.com/inventaire/inventaire/>) as Wikibase federation wasn't ready at all when we started, and still misses some critical pieces today, but we are considering moving the bibliographic data in a dedicated federated Wikibase instance at some point <https://github.com/inventaire/inventaire/issues/186>. The rest of the data (users, inventories, transactions, maybe reviews <https://trello.com/c/uwdkvGl1/114-book-reviews> in the future) would keep their current form (documents in CouchDB databases without any relation to the Wikidata data model). So, answering your question, I don't think Wikidata is the place to crowdsource data about retail products but I'm convinced a database doing this should do it using Wikidata vocabulary! And just like we are glad that the WikiProject_Books <https://www.wikidata.org/wiki/Wikidata:WikiProject_Books> and WikiCite <https://www.wikidata.org/wiki/Wikidata:WikiCite/Roadmap> exists to work on a consistent (**cough** almost **cough**) data model on books that we can reuse within Inventaire <https://inventaire.github.io/entities-map/>, there are several projects in or around Wikidata with which such a project could/should work: - the *WikiObject <https://meta.wikimedia.org/wiki/WikiObject>* sister project proposal: you got to check that, Quico, the main contributor (in cc) has been doing quite some research on this very close project - Wikidata:WikiProject_Companies <https://www.wikidata.org/wiki/Wikidata:WikiProject_Companies> - Wikidata:W <https://www.wikidata.org/wiki/Wikidata:WikiProject_Materials> ikiProject_Materials <https://www.wikidata.org/wiki/Wikidata:WikiProject_Materials> - OpenFoodFacts <http://openfoodfacts.org/>, which also has to deal with GTIN and products properties, and which expressed interest in getting more integrated with Wikidata <https://en.wiki.openfoodfacts.org/Structured_Data/Wikidata> Also of interest: - Open Product Data <http://product-open-data.com/>, a project that was sharing your idea but couldn't get the momentum(?) - the GoodRelations <http://www.heppnetz.de/projects/goodrelations/> ontology - OpenCorporates <https://opencorporates.com/>, unfortunately not so open from what I could tell I have been dreaming of such a database for a while now (see my (now old <https://maxlath.eu/articles/p2p-rm/>, Wikidata and the apt-get of things <https://maxlath.eu/articles/wikidata-and-the-apt-get-of-things/>, Mapping resources using open knowledge <https://maxlath.eu/articles/mapping-resources-using-open-knowledge/>), and extending Inventaire to other things that books has always been in the category of the possible futures, so I would be more than happy to hear more about any progresses on this :) Bests, Maxime Lathuilière maxlath.eu - twitter <https://twitter.com/maxlath> - mastodon <http://mastodon.social/@maxlath> - User:Maxlath <https://www.wikidata.org/wiki/User:Maxlath> inventaire.io - roadmap <https://trello.com/b/0lKcsZDj/inventaire-roadmap> - code <https://github.com/inventaire/inventaire> - mastodon <https://mamot.fr/@inventaire> - twitter <https://twitter.com/inventaire_io> - facebook <https://facebook.com/inventaire.io> for personal emails use max(a)maxlath.eu instead Le 19/09/2018 à 21:49, Abe Voelker a écrit : Hello, I was checking out Wikidata and was wondering if it would be a good fit for a website I wanted to make to crowdsource data about retail products, storing properties like product name, description, UPC/GTIN, MPN, manufacturer, color, size, and so on. I take it that due to Wikidata's Wikipedia notability requirement I'd have to operate my own Wikibase instance separate from Wikidata? In that case, is it still possible to integrate with Wikidata's ontologies, or do I have to have my own completely separate ontology from scratch (I'd hate to have to reinvent the real basic properties and constraints)? Are there similar projects I could look at to get an idea how to partially-fork Wikidata in this way? Another thing I'm wondering about is how I would integrate data that wouldn't necessarily fit into the product data ontology, like customer reviews of the product, or sale offers (offers having their own properties like price, availability, condition, and hyperlink to seller's site) - things that aren't inherent characteristics of the item and change often. I was wondering if it would be easier to have a "wrapper" website that stores this data separate, while still integrating with the core product data from Wikibase. Does anyone have any experience or references to projects doing an integration like that? I'm wondering what the easiest way to integrate the two would be - connect directly to the MySQL database, sync databases with hooks, SPARQL, etc. Also, some of the data for this website I'd wish to populate by crawling online retail stores and manufacturers and performing edits with a bot. Some of these sites provide schema.org metadata, so I was wondering if that makes integration with Wikidata/Wikibase any easier, or do I still have to do some kind of manual mapping process between the two. Thanks for your patience with this braindump as I'm new to Wikidata and still trying to wrap my head around things. I did the Wikidata tutorials, messed around with a local Wikibase install using Docker Compose, and a lot of clicking around Wikidata and reading about ontologies but it feels like I've just barely scratched the surface! Thank you, Abe Voelker _______________________________________________ Wikidata mailing listWikidata@lists.wikimedia.orghttps://lists.wikimedia.org/mailman/listinfo/wikidata