It works well, but it's a descendant tree (the father of Djingis Khan is
not in the tree). My question is how to explore family trees in the
opposite direction, I mean from children to parents, and more generally
to get all the relatives of a given person. The fact that there are two
different properties, one for the child-father link and one for the
child-mother link, makes the query much more difficult in this case.
Le 05/10/2020 à 15:58, Magnus Sälgö a écrit :
Have you tested gas:traversalDirection below we follow child
gas:traversalDirection "Undirected"
example https://w.wiki/fDz
#People related to Djingis Khan
#defaultView:Graph
PREFIX gas: <http://www.bigdata.com/rdf/gas#>
SELECT ?item ?itemLabel ?pic ?WikiTreef ?FindAGravef ?linkTo {
SERVICE gas:service {
gas:program gas:gasClass "com.bigdata.rdf.graph.analytics.SSSP" ;
gas:in wd:Q720 ;
gas:traversalDirection "Undirected" ;
gas:out ?item ;
gas:out1 ?depth ;
gas:maxIterations 4 ;
gas:linkType wdt:P40 .
}
OPTIONAL { ?item wdt:P40 ?linkTo }
OPTIONAL { ?item wdt:P18 ?pic }
SERVICE wikibase:label {bd:serviceParam wikibase:language "sv" }
}
------------------------------------------------------------------------
*From:* Wikidata <wikidata-boun...@lists.wikimedia.org> on behalf of
Olaf Simons <olaf.sim...@pierre-marteau.com>
*Sent:* Monday, October 5, 2020 1:53 PM
*To:* Discussion list for the Wikidata project.
<wikidata@lists.wikimedia.org>
*Subject:* Re: [Wikidata] a question of data modeling about family ties
Dear Wikidata list,
one of our big contributors, Bruno Belhoste in Paris, just gave me a
weird question which I feel I cannot answer that fast.
We, FactGrid, are a Wikidata child and so it came that we adopted
structures like the father/mother differentiation. Bruno's question is
now whether it would not have been wise to just create just a "parent"
option instead of the gender fork that splits the lineages. Let me
insert his mail:
> Dear Olaf,
>
> I have a question of data modeling in FactGrid concerning family ties.
> We have one property for children (P150) and also one for siblings
> (P203), but two different properties for parents: father (P141) and
> mother (P142). The problem is: how can you get all the members of the
> family of somebody? One have (1) to explore both the matrilinear trees
> and the patrilinear trees at each generation to get all the ancestors
> and (2) to get all the descents of these ancestors. It is very complex.
> It would be much simpler to have only one property including the father
> and the mother.
>
> In case we choose this solution, it would be easy to transform all the
> triples with P141 or P142 into triples with the new property. What do
> you think about that? Have you another solution for querying family
links?
>
> All the best,
>
> Bruno
I wonder what people with more data knowledge think about the proposal
(which would affect just our site, not Wikidata...) (so: no worries,
we can do experimental things without affecting our parent - I
hesitate to speak of a father or mother - Wikidata).
Best,
Olaf
Dr. Olaf Simons
Forschungszentrum Gotha der Universität Erfurt
Schloss Friedenstein, Pagenhaus
99867 Gotha
Büro: +49-361-737-1722
Mobil: +49-179-5196880
Privat: Hauptmarkt 17b/ 99867 Gotha
_______________________________________________
Wikidata mailing list
Wikidata@lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikidata
_______________________________________________
Wikidata mailing list
Wikidata@lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikidata
_______________________________________________
Wikidata mailing list
Wikidata@lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikidata