On Fri, Aug 10, 2018, 11:12 Niklas Laxström <[email protected]> wrote:
> Has anyone imported a subset of Wikidata into another Wikibase? How > did you do it? > > I am working a project which wants to import Wikidata properties into > their Wikibase. I looked into how to do this, but I am hitting > roadblocks. > > 1) Fetching data > This part is easy, can do it via the API or dumps. If I only take > labels and descriptions and datatypes, then I don't even need to worry > about fetching any items referenced in the properties' properties. > > 2) Importing data > It's possible to create properties via api.php?action=wbeditentity, > but it does not allow specifying the id for new entities. We would > like to keep the ids same as in Wikidata for simplicity. I thought > that I would just create all properties up to P6000 or so, edit them > via the api, and then delete the unused properties. However, this > won't work because the property datatype must be specified at creation > time and cannot be changed afterwards. > In general I don't think you should strive for keeping the same IDs. They are going to diverge anyway as Wikidata and your wiki evolve. A mapping with statements is likely more useful. Cheers Lydia Possible solutions: > a) Make it possible to specify the id of newly created entity (likely > guarded with a special right). > b) Make it possible to change property datatype after creation. > c) Drop the requirement of using the same ids in our wikibase. > d) Use a MediaWiki maintenance script where it is possible to bypass > restrictions and specify the id of the newly created entity. > Afterwards database must be updated manually to increase the tracker > for next free entity number to match the highest used id. > e) Avoid having to import properties (e.g. wait for support for > federated wikibases, implement an another storage mechanism that only > refers to Wikidata ids without having them in place.) > > I am currently dreaming of (a) and probably going for (d) for which I > already have a rudimentary script. Any comments, suggestions or tips? > > -Niklas > > _______________________________________________ > Wikidata-tech mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata-tech >
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