Hey,
Is "altitude" attribute in
"globe-coordinate" property type still in use?
It is not in use and never really was. (Code indicating it is not in use:
https://github.com/DataValues/Geo/blob/2d8e852d04318b13bd0db39b24afe7c56c61…
)
I'm not entirely sure why it is still in the API output and what the plans
with it are, but my guess is that it is still there for compatibility
reasons and that there is no intention of using this key in the future. If
I where creating an API client I'd just ignore this key.
Currently the “type” (in “datavalue” node) and
“datatype” attributes
seems somewhat duplicate, are you planning to make it possible
for one
“datatype” to support some other “type”s, to some extent similar to
polymorphism?
The "type" key is part of the "datavalue" map, and indicates the type
of
the DataValue. The DataValues are what is used to represent all values. The
"datatype" key is the type of the property. This latter type always has
corresponding DataValue, but many property types can have the same
DataValue. The property type can add restrictions on what the value can be.
So you can have a "number DataValue" used by both a "number property
type"
and a "percentage property type", where the percentage one limits the
allowed values to [0, 100].
Hopefully there is some user-facing documentation on this somewhere.
Cheers
--
Jeroen De Dauw |
https://entropywins.wtf |
https://keybase.io/jeroendedauw
Software craftsmanship advocate | Developer at Wikimedia Germany
~=[,,_,,]:3
On 12 October 2017 at 04:08, CXY <forest93(a)163.com> wrote:
Hi there,
I'm currently working on a .NET implementation of Wikibase API client, and
have some (perhaps somewhat trivial) questions
Take the API response for wbgetentities on Q513
<https://www.wikidata.org/wiki/Special:ApiSandbox#action=wbgetentities&format=json&uselang=en&ids=Q513&redirects=yes&props=claims&normalize=1>
for example. In the response, we have a claim
…
"P625": [
{
"mainsnak": {
"snaktype": "value",
"property": "P625",
"hash": "72a03bd4ecbba1e7d0e0dfc2779ceccf9b2e0bcb",
"datavalue": {
"value": {
"latitude": 27.988055555556,
"longitude": 86.925277777778,
"altitude": null,
"precision": 0.00027777777777778,
"globe": "http://www.wikidata.org/entity/Q2"
},
"type": "globecoordinate"
},
"datatype": "globe-coordinate"
},
"type": "statement",
"id": "q513$6dcddd25-48a6-229a-0e36-31b122c2c813",
"rank": "normal",
"references": [
{
…
1. Is "altitude" attribute in "globe-coordinate" property type
still
in use? I saw this attribute in the API responses, but as far as I can
observe, they are always null. Is this attribute either reserved for future
use or obsoleted? (I’ve opened T177269
<https://phabricator.wikimedia.org/T177269>but later thought that maybe
mail list is more appropriate for this.)
2. Currently the “type” (in “datavalue” node) and “datatype”
attributes seems somewhat duplicate, are you planning to make it possible
for one “datatype” to support some other “type”s, to some extent similar to
polymorphism?
Regards,
Xinyan
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