Good Point! The first things I thougt about were populations and other
country, region or city oriented data.
But would two fields that can be set to NULL as default - valid_from ->
the beginning of the time, valid_to -> the end of the universe - hurt
anyone?
Am Fr 05.04.2013 00:37, schrieb Michael Hale:
I don't have any data to agree or disagree with you about that, but
most of the edits I have made have been for films. Most of those
claims are immutable.
------------------------------------------------------------------------
Date: Fri, 5 Apr 2013 00:34:21 +0200
From: bene...@zedat.fu-berlin.de
To: wikidata-l@lists.wikimedia.org
Subject: Re: [Wikidata-l] Page history and properties
I don't think, that the most claims are immutable.
Am Fr 05.04.2013 00:30, schrieb Michael Hale:
We will use qualifiers to tag values with dates for which they are
relevant if there isn't a better place to put the information. We
commonly use the example of historic population values. MediaWiki
software saves disk space by delta encoding edit histories.
http://en.wikipedia.org/wiki/Delta_encoding
I can probably think of at least 5 different ways we could arrange
the schema of Wikidata to store information about US presidents,
but I don't think using universal valid_from and valid_to values
for every claim is the most efficient, natural, or flexible way to
do so.
> Date: Fri, 5 Apr 2013 00:08:00 +0200
> From: bene...@zedat.fu-berlin.de <mailto:bene...@zedat.fu-berlin.de>
> To: wikidata-l@lists.wikimedia.org
<mailto:wikidata-l@lists.wikimedia.org>
> Subject: Re: [Wikidata-l] Page history and properties
>
> And what are you doing when you want the knowledge of the world
from 5
> years ago? Isn't this a valid need? To compare what have changed
for
> example in the measurement of ocean depth?
>
> These snapshots could be a low hanging fruit with valid_from and
> valid_to and it is saving disk space compared to storing
complete dumps
> every day.
>
>
> Instead of having a "List of Presidents of the US" or looking up
every
> person for a property "President of the USA" you could get this
List
> from the property "President" from the Item "USA" together with
> valid_from and valid_to.
>
> Lukas
>
> Am Do 04.04.2013 22:23, schrieb Michael Hale:
> > I thought one of the main reasons we are making Wikidata is so
that
> > you can update a value there, and then everywhere it is used
will be
> > automatically updated. If we find a more precise measurement
for the
> > depth of an ocean trench, then I just want to update it on
Wikidata,
> > and then every article that references it will be updated. I
don't
> > want to have to update it on Wikidata and then go do a null
edit on
> > every article that uses that information.
>
>
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