I don’t understand the problem, the query shouldn’t need to get much
more complicated… what kind of query did you have in mind? Here’s a
simple one for all ancestors of Frodo Baggins
<https://query.wikidata.org/#SELECT%20DISTINCT%20%3Fitem%20%3FitemLabel%20WHERE%20%7B%0A%20%20wd%3AQ177329%20%28wdt%3AP22%7Cwdt%3AP25%29%2a%20%3Fitem.%0A%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%7D>:
SELECT DISTINCT ?item ?itemLabel WHERE {
wd:Q177329 (wdt:P22|wdt:P25)* ?item.
SERVICE wikibase:label { bd:serviceParam wikibase:language
"[AUTO_LANGUAGE],en". }
}
Cheers,
Lucas
On 05.10.20 19:10, Bruno Belhoste wrote:
> 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 <[email protected]> on behalf of
>> Olaf Simons <[email protected]>
>> *Sent:* Monday, October 5, 2020 1:53 PM
>> *To:* Discussion list for the Wikidata project.
>> <[email protected]>
>> *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
>>
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>
>
>
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