Re: [External] Re: The Joy of NULLs (not)

Vanity license plates in USA are strings, right? Then this problem would
only happen if NULL='NULL', which is not.

It could be that the private company stored 'NULL' instead of NULL to the
unassigned tickets, but that's really bad coding/design (and easy to fix, I
guess).

Or maybe the DAO wrongly translate NULL to 'NULL' at some point.

Cheers

dfcp










--
diogo patrão




On Mon, Aug 12, 2019 at 11:11 AM Young,Jeff (OR) <jyoung@oclc.org> wrote:

> Here’s an example showing blank nodes being used to declare the place of
> birth is unknown in Wikidata:
>
>
>
> https://w.wiki/6$y
>
>
>
> In the UI, it is rendered like this:
>
>
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>
>
> Jeff
>
>
>
> *From: *Daniel Hernandez <daniel@degu.cl>
> *Date: *Monday, August 12, 2019 at 9:42 AM
> *To: *"semantic-web@w3.org" <semantic-web@w3.org>
> *Subject: *[External] Re: The Joy of NULLs (not)
> *Resent-From: *<semantic-web@w3.org>
> *Resent-Date: *Monday, August 12, 2019 at 9:37 AM
>
>
>
> As Enrico pointed, blank nodes can be used to represent unknown values.
> An example of this use is Wikidata. I don't know another example.
>
> --
> Daniel
>
> On Mon, 12 Aug 2019 07:36:41 +0000
> Franconi Enrico <franconi@inf.unibz.it> wrote:
>
> > Mike, this could easily happen in an RDF world if you register a
> > vanity licence plate with anything starting with "_". Indeed, bnodes
> > would be the right way to represent unknown but existing plates. --e.
> >
> > Il giorno 11 ago 2019, alle ore 23:10, Michael F Uschold
> > <uschold@gmail.com<mailto:uschold@gmail.com>> ha scritto:
> >
> >> This is hilarious. It could never happen in an RDF world! No value,
> >> no triple.
> >>
> >> He tried to prank the DMV. Then his vanity license plate backfired
> >> big time.
> >> https://mashable.com/article/dmv-vanity-license-plate-def-con-backfire/
> <http://flip.it/NIk7FD>
>
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>