Hi!

> One also has to be careful with qualifiers etc. For example, the start
> end end of a "spouse" statement should be copied to its symmetric
> version, but there might also be qualifiers that should not be copied
> like this. I would like to work on a proposal for how to specify such
> things. It would be good to coordinate there.

By coincidence, just today I was looking into "spouse" property's
qualifiers, specifically start/end times - and we do have a sizeable
number of entries where qualifiers on both ends do not match. Usually,
the case is that one of them is missing, however it is possible to have
them have different values - as different sources (especially after
importing from different language wikis which may contain different
information) may contain different values. We probably will need to have
some way of manually handling such cases.

> A first step (even before adding any statement to Wikidata) could be to
> add inferred information to the query services and RDF exports. This

Due to the above, automatic inference may be not trivial, especially for
exports which are now processed in context-free fashion - i.e. each
entity is more or less processed independently of others. There are also
performance concerns - if when generating data about certain entity we
will also need to load data about all entities it relates to, it greatly
increases the workload per item, so we need to see if we can do it
efficiently when doing dumps, etc.

--
Stas Malyshev
smalyshev@wikimedia.org

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