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
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