Hi,
The offical documentation is
https://www.wikidata.org/wiki/Help:Data_type#quantity but indeed there is
no indication of the limit.
From what I tested, apparently you can enter any number
which is less than
127 characters long
(
https://www.wikidata.org/wiki/Q4115189#P1104).
Cheers,
~nicolas
Le lun. 7 oct. 2019 à 08:58, John Erling Blad <jeblad(a)gmail.com> a écrit :
Is there any documentation of the number format used
by the quantity type?
Bumped into this and had to implement the BCmath extension to handle the
number. The reason why I did it (except it was fun) is to handle some weird
unit conversions. By inspection I found there were numbers at Wikidata that
clearly could not be implemented as doubles, and testing a little I found
that this had to be implemented as some kind of big numbers. Lua does not
have big numbers, and using the numbers from quantity as a plain number
type is a coming disaster.
So, is there any documentation for the quantity format anywhere? I have
not found anything. I posted a task about it, and please add info there if
you know where some info can be found. I suspect the format just happen to
be the same as BC, and nobody really checked if the format was compatible,
or…?
The BCmath extension can be found at
-
https://www.mediawiki.org/wiki/Extension:BCmath
-
https://github.com/jeblad/BCmath
There is a Vagrant role if anyone likes to test it out.
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