Fixed. Thanks for letting us know.
El mar., 20 de mar. de 2018 a la(s) 08:23, Riccardo Tasso < riccardo.ta...@gmail.com> escribió: > 404 Error on http://grafa.dcc.uchile.cl/ > > Could you please fix it? > > 2018-03-08 21:02 GMT+01:00 Aidan Hogan <aid...@gmail.com>: > >> Hi Joachim! >> >> Understood, yes! The ability to select entities with any value for some >> property is something I agree would be a useful next step, and the use-case >> you mention of something like a Wikidata/GraFa exploration of external >> resources is very interesting! Thanks! >> >> There are some technical reasons why it would not be so trivial right >> now, mostly in the back-end relating to caching. GraFa caches all facets >> for all possible queries that generate more than 50,000 results. This is >> how we can generate the exact facets, for example, for the 352,063 people >> from the U.S. in under a second (the data are precomputed; if I recall >> correctly, otherwise the query would take around 30 seconds). The ability >> to query for existential values (a property with any value) will increase a >> lot the number of queries we would have to cache. I think it would still be >> feasible in the current system, but we would have to do some work. In any >> case, I have added it to the issue tracker! >> >> (On a more organisational side, I'm just noticing now that there's quite >> a few open issues on the tracker to look at, but José Moreno, the masters >> student who did all the hard work on GraFa, is currently finalising his >> thesis and preparing to defend. Hence development on Grafa is paused for >> the moment but I hope we can find a way to continue since the feedback has >> been encouraging!) >> >> Cheers, >> Aidan >> >> >> On 07-03-2018 9:04, Neubert, Joachim wrote: >> >>> Hi Aidan, >>> >>> Thanks for your reply! My suggestion indeed was to feed in a property >>> (e.g. " P2611") - not a certain value or range of values for that property >>> - and to restrict the initial set to all items where that property is set >>> (e.g., all known TED speakers in Wikidata). >>> >>> That would allow to apply further faceting (e.g., according to >>> occupation or country) to that particular subset of items. In effect it >>> would offer an alternate view to the original database (e.g., >>> https://www.ted.com/speakers which is organized by topic and by event). >>> Thus, the full and often very rich structured data of Wikidata could be >>> used to explore external datasets which are linked to WD via external >>> identifiers. >>> >>> Being able to browse their own special collections by facets from >>> Wikidata could perhaps even offer an incentive to GLAM institutions to >>> contribute to Wikidata. It may turn out much easier to add some missing >>> data to Wikidata, in relation to introducing a new field in their own >>> database/search interface, and populating it from scratch. >>> >>> So I'd suggest that additional work invested into GraFa here could pay >>> out in a new pattern of use for both Wikidata and collections linked by >>> external identifiers. >>> >>> Cheers, Joachim >>> >>> -----Ursprüngliche Nachricht----- >>> Von: Wikidata [mailto:wikidata-boun...@lists.wikimedia.org] Im Auftrag >>> von Aidan Hogan >>> Gesendet: Mittwoch, 7. März 2018 06:16 >>> An: wikidata@lists.wikimedia.org >>> Betreff: Re: [Wikidata] GraFa: Faceted browser for RDF/Wikidata [thanks!] >>> >>> Hi Joachim, >>> >>> On 14-02-2018 7:32, Neubert, Joachim wrote: >>> >>>> Hi Aidan, hi José, >>>> >>>> I'm a bit late - sorry! >>>> >>> >>> Likewise! :) >>> >>> What came to my mind as an perhaps easy extension: Can or could the >>>> browser be seeded with an external property (for example P2611, TED speaker >>>> ID)? >>>> >>>> That would allow to browse some external dataset (e.g., all known TED >>>> speakers) by the facets provided by Wikidata. >>>> >>> >>> Thanks for the suggestion! While it might seem an easy extension, >>> unfortunately that would actually require some significant changes since >>> GraFa only considers values that have a label/alias we can auto-complete on >>> (which in the case of Wikidata means, for the most part, Q* values). >>> >>> While it would be great to support datatype/external properties, we >>> figured that adding them to the system in a general and clean way would not >>> be trivial! We assessed that some such properties require ranges (e.g., >>> date-of-birth or height), some require autocomplete (e.g., first name), >>> etc. ... and in the case of IDs, it's not clear that these are really >>> useful for faceted browsing perhaps since they will jump to a specific >>> value. Hence it gets messy to handle in the interface and even messier in >>> the back-end. >>> >>> (A separate issue is that of existential values ... finding entities >>> that have some value for a property as your example requires. That would >>> require some work, but would be more feasible!) >>> >>> Best, >>> Aidan >>> >>> -----Ursprüngliche Nachricht----- >>>>> Von: Wikidata [mailto:wikidata-boun...@lists.wikimedia.org] Im >>>>> Auftrag von Aidan Hogan >>>>> Gesendet: Donnerstag, 8. Februar 2018 21:33 >>>>> An: Discussion list for the Wikidata project. >>>>> Cc: José Ignacio . >>>>> Betreff: Re: [Wikidata] GraFa: Faceted browser for RDF/Wikidata >>>>> [thanks!] >>>>> >>>>> Hi all, >>>>> >>>>> On behalf of José and myself, we would really like to thank the >>>>> people who tried out our system and gave us feedback! >>>>> >>>>> >>>>> Some aspects are left to work on (for example, we have not tested for >>>>> mobiles, etc.). However, we have made some minor initial changes >>>>> reflecting some of the comments we received (adding example text for >>>>> the type box, clarifying that the numbers refer to number of results >>>>> not Q codes, etc.): >>>>> >>>>> http://grafa.dcc.uchile.cl/ >>>>> >>>>> >>>>> To summarise some aspects of the work and what we've learnt: >>>>> >>>>> * In terms of usability, the principal lesson we have learnt (amongst >>>>> many) is that it is not clear for users what is a type. For example, >>>>> when searching for "popes born in Poland", the immediate response of >>>>> users is to type "pope" rather than "human" or "person" in the type >>>>> box. >>>>> In a future version of the system, we might thus put less emphasis on >>>>> starting the search with type (the original reasoning behind this was >>>>> to quickly reduce the number of facets/properties that would be shown). >>>>> Hence the main conclusion here is to try to avoid interfaces that >>>>> centre around "types". >>>>> >>>>> >>>>> * A major design goal is that the user is only ever shown options >>>>> that lead to at least one result. All facets computed are exact with >>>>> exact numbers. The technical challenge here is displaying these >>>>> facets with exact numbers and values for large result sizes, such as >>>>> human: >>>>> >>>>> http://grafa.dcc.uchile.cl/search?instance=Q5 >>>>> >>>>> This is achieved through caching. We compute all possible queries in >>>>> the data that would yield >50,000 results (e.g., human->gender:male, >>>>> human->gender:male->country:United States, etc.). We then compute >>>>> human->their >>>>> facets offline and cache them. In total there's only a couple of >>>>> hundred such queries generating that many results. The facets for >>>>> other queries with fewer than 50,000 results are computed live. Note >>>>> that we cannot cache for keyword queries (instead we just compute >>>>> facets for the first >>>>> 50,000 most relevant results). Also, if we add other features such as >>>>> range queries or sub-type reasoning, the issue of caching would >>>>> become far more complex to handle. >>>>> >>>>> >>>>> In any case, thanks again to all those who provided feedback! Of >>>>> course further comments or questions are welcome (either on- or >>>>> off-list). >>>>> Likewise we will be writing up a paper describing technical aspects >>>>> of the system soon with some evaluation results. Once it's ready we >>>>> will of course share a link with you. >>>>> >>>>> Best, >>>>> Aidan and José >>>>> >>>>> >>>>> -------- Forwarded Message -------- >>>>> Subject: Re: GraFa: Faceted browser for RDF/Wikidata [feedback >>>>> requested] >>>>> Date: Mon, 15 Jan 2018 11:47:18 -0300 >>>>> From: Aidan Hogan <aid...@gmail.com> >>>>> To: Discussion list for the Wikidata project. >>>>> <wikidata@lists.wikimedia.org> >>>>> CC: José Ignacio . <jos...@live.cl> >>>>> >>>>> Hi all! >>>>> >>>>> Just a friendly reminder that tomorrow we will close the >>>>> questionnaire so if you have a few minutes to help us out (or are >>>>> just curious to see our faceted search system) please see the links >>>>> and instructions below. >>>>> >>>>> And many thanks to those who have already provided feedback! :) >>>>> >>>>> Best, >>>>> José & Aidan >>>>> >>>>> On 09-01-2018 14:18, Aidan Hogan wrote: >>>>> >>>>>> Hey all, >>>>>> >>>>>> A Masters student of mine (José Moreno in CC) has been working on a >>>>>> faceted navigation system for (large-scale) RDF datasets called >>>>>> "GraFa". >>>>>> >>>>>> The system is available here loaded with a recent version of Wikidata: >>>>>> >>>>>> http://grafa.dcc.uchile.cl/ >>>>>> >>>>>> Hopefully it is more or less self-explanatory for the moment. :) >>>>>> >>>>>> >>>>>> If you have a moment to spare, we would hugely appreciate it if you >>>>>> could interact with the system for a few minutes and then answer a >>>>>> quick questionnaire that should only take a couple more minutes: >>>>>> >>>>>> https://goo.gl/forms/h07qzn0aNGsRB6ny1 >>>>>> >>>>>> Just for the moment while the questionnaire is open, we would kindly >>>>>> request to send feedback to us personally (off-list) to not affect >>>>>> others' responses. We will leave the questionnaire open for a week >>>>>> until January 16th, 17:00 GMT. After that time of course we would be >>>>>> happy to discuss anything you might be interested in on the list. :) >>>>>> >>>>>> After completing the questionnaire, please also feel free to visit >>>>>> or list something you noticed on the Issue Tracker: >>>>>> >>>>>> https://github.com/joseignm/GraFa/issues >>>>>> >>>>>> >>>>>> Many thanks, >>>>>> Aidan and José >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> _______________________________________________ >>>>> 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 >>> _______________________________________________ >>> 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 >
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