Those are the ids of statements. They are formed using the statement's
UUID, which typically uses the item id (sometimes with a lower-case "q")
as its first part. However, the exact form of the IDs should not be used
to find out what the thing is or which item it belongs to: all of this
information is encoded in triples in the dump, and these should be used
to find out if a URI refers to an item or a statement etc.
On 08.01.2016 12:45, David Przybilla wrote:
While playing with the dump, I came accross some
entries like the following:
<http://www.wikidata.org/entity/P646v> "/m/021821" .
what does the `Q12258SCD97A47E-A0CA-453F-B01A-DEE8829139BF` stand for ?
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