Questions tagged [wikidata]

Wikidata is a project of the Wikimedia foundation related to open data

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5
votes
1answer
106 views

Julian and Gregorian dates from Wikidata

How can I get the Julian birth or death date for someone who was born or died under the Julian Calendar (Isaac Newton, for example) on Wikidata using a SPARQL query? This simple query returns "4 ...
1
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1answer
42 views

Restrict returned claims in entity

Is there a way to restrict the returned claims on wikidata's REST API? For example I am using this query: https://www.wikidata.org/w/api.php?action=wbgetentities&ids=Q17714&props=claims&...
1
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1answer
57 views

How can I get data about Wikipedians (e.g. language proficiency), by username?

Is there an open dataset containing information such as username, language proficiency levels (https://en.m.wikipedia.org/wiki/Wikipedia:Babel/Levels) and (possibly) academic degrees and nationality ...
1
vote
1answer
50 views

Search in wikidata with specific Q code

I've this query but I can't understand why doesn't return any result. I try different versions (with link, with only code, with wd:code) but nothing seems to work. What I need is this query but ...
3
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2answers
144 views

Mapping between ImageNet and Wikidata entities

Wikidata and ImageNet both know oxcarts: https://www.wikidata.org/wiki/Q1190777 http://imagenet.stanford.edu/synset?wnid=n03868242 (slow) An AI library gives me the ImageNet "synset" about oxcarts. ...
2
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0answers
114 views

How to use DBpedia to identify the topics

In the paper "Discovering Relevant Topics using DBPedia providing non-obvious recommendations" they have used skos:broader property and dcterms:subject property. In my task given the word I want to ...
1
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1answer
197 views

Weird results in search from wikidata

I ve this query, which i want to find every instance of human with name Jose (already a first name like John, very common) in wikidata spanish, and then I get only 10 results. I believe is the way of ...
2
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1answer
179 views

Wikidata - Search of human instance that doesn't break

Is this possible, like the wikidata autocomplete combo works, in a speedy way, with a filter of "itemlabel strings start with..." ? PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> SELECT ?item ...
1
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1answer
99 views

WikiData - Specific country with flag and emojiflag by item ID

I need to query the WikiData to get for an specific country code (that I've, for the example is Q414 (ARG), the flag and the emoji flag respective. The emoji, by I know, is on zxx lang, but anyway any ...
4
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1answer
570 views

Is there any open dataset for named entity linking?

Entity linking is the task of detecting mentions of entities from a knowledge base in a document. Are there any openly available datasets to train and evaluate such systems? The datasets I came ...
2
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2answers
65 views

What are commonly used ontologies for spatial relations with terms like "delimit"?

Currently, on Wikidata there is an open proposal to have a projecty about delimit which is supposed to have the meaning of "Walls of Jerusalem delimit Old City of Jerusalem". For good ...
4
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1answer
119 views

Wikidata differs from Wikipedia

I am trying to retrieve data for a company programmatically using the Wikidata API. However, the data retrieved from Wikidata is different from en.wikipedia.org. Is this expected? Example: Nissan ...
2
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0answers
92 views

Property and sub-property pairs

Here are some example records: https://www.wikidata.org/wiki/Q11361734 https://www.wikidata.org/wiki/Q74669 I have the following (updated) query: # Script #2 SELECT (GROUP_CONCAT( ?...
2
votes
1answer
69 views

Find all Wikidata items that use a particular P18 picture

I want to find all Wikidata items that have "Gthumb.svg" as a P18 property. Leaving aside the fact that "Gthumb.svg" may not exist on Commons and that normal P18 values have a "commons:" prefix, it ...
3
votes
1answer
344 views

Most efficient way to get the Wikidata entity for a city, given as a string

The goal is to get from the string "Lugano", the entity Q7024, knowing that I am searching for Swiss locations, by name in German. So far this is how I do it but it doesn't look very efficient. 1) ...
3
votes
1answer
87 views

Sort results by proximity with the "around" service in Wikidata

With this query, I can get a list of German cities around Berlin, within a radius of 50 km. SELECT ?place ?placeLabel ?location WHERE { wd:Q64 wdt:P625 ?arcLoc . ?place wdt:P31 wd:Q515 . ?...
2
votes
1answer
476 views

Wikidata - How to get a table with all US cities with associated counties?

I did not find existing data of good quality that I can use directly. I thought that Wikidata was the best source to use and that it would be an opportunity to learn how to extract from this data ...
3
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3answers
275 views

wikidata extract

I have a list of wikidata entity IDs (i.e. Tour Eiffel Q243, Big Ben Q41225...), and a list of properties (i.e. coordinates P625, country P18 ...). Is there any way to gather and extract in Excel (or ...
4
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3answers
164 views

Icons set to represent Wikidata classes (hospital, park, waterfall, prison, school, etc)

I am looking for icons that can illustrate Wikidata classes such as: Q16917 hospital Q22698 park Q34038 waterfall Q40357 prison Q3914 school etc I could use each class' image property, but ...
8
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2answers
946 views

Wikidata get property of property

This question is related to this. We have the following query: SELECT DISTINCT ?item ?itemLabel ?AuthorLabel ?year WHERE { ?item wdt:P166 wd:Q255032. ?item wdt:P50 ?Author . ?item wdt:P577 ...
3
votes
2answers
110 views

Info based on page title?

I'm looking for a way to get info from wikipedia based on the page title. example: If i have a page called "Britney Spears" i want to be able to get a simple bio extracted from wikipedia onto the ...
4
votes
2answers
841 views

get item's properties know QID

Know QID I can get items's label: SELECT DISTINCT * WHERE { wd:Q302 rdfs:label ?label . FILTER (langMatches( lang(?label), "EN" ) ) SERVICE wikibase:label { bd:serviceParam wikibase:language "...
1
vote
1answer
140 views

get label (Name) instead QID field

Using the following query: SELECT ?item ?itemLabel ?itemDescription ?director WHERE { ?item wdt:P31 wd:Q11424 . ?item wdt:P161 wd:Q2263 . OPTIONAL{?item wdt:P57 ?director .} SERVICE wikibase:...
6
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2answers
188 views

Retrieve periodic table information from wikidata

I'm trying to retrieve some basic informations from chemical elements stored in wikidata to create an interactive periodic table. It's my first attempt to use wikidata, so I've understood how to get ...
4
votes
1answer
206 views

Publishing (structured?) data about products: information about products, barcodes, photos (incl. packaging)

Is it legal to publish photos of products and their packaging? Can such be done anonymously on some open license? (which would be the best for such data to be open for public use, as products are ...
3
votes
1answer
226 views

Wikidata: QueryTimeoutException: Query deadline is expired

I used to execute successfully the following query: SELECT (COUNT(?r) AS ?count) WHERE { [] <http://www.wikidata.org/prop/direct/P31> ?r } on http://wdqs-beta.wmflabs.org/bigdata/namespace/wdq/...
9
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2answers
340 views

Is Wikidata up to date with Wikipedia?

I think that DBpedia links to Wikipedia by Wikipedia database dump, making it not up to date with on-line Wikipedia contents. I was wondering if Wikidata uses on-line Wikipedia content or if it also ...
2
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0answers
39 views

Percentage of radio stations that are terrestrial stations versus Internet stations

What are the percentages of radio stations which provide: terrestrial radio station only Internet radio station both I am looking into this data by year and world country. Thank you for your ...
5
votes
1answer
187 views

Constructing a WordNet-like tree from the Wikidata dataset?

Is there an approach to constructing a semantic tree somewhat like WordNet, but using the vastly more structured and useful Wikidata data instead? How could this work? Could we place similar entities ...
2
votes
1answer
280 views

How to get the property name for a specific ID?

Wikidata entities have claims, inside which are property IDs with their snaks. But how do I get the name for a particular property ID?
4
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1answer
1k views

Get QID from Wikidata label name, via SPARQL

I use api.php to get the QID of something using its English label. Example: Mozambique → Q1029 $ wget --quiet -O - "http://www.wikidata.org/w/api.php?action=wbgetentities \ &sites=enwiki&...
5
votes
1answer
276 views

Wikidata label language: How to fallback to ANY language?

In Wikidata, this shows labels in English, and falls back to Russian if no English is available: SERVICE wikibase:label { bd:serviceParam wikibase:language "en, ru" . } QUESTION: How to fall back ...
2
votes
2answers
224 views

How to get all Wikidata items in a country?

Using SPARQL I want to show all French embassies in Liberia (spoiler: there is exactly one) So I wrote this naive query: SELECT ?item WHERE { ?item wdt:P17 wd:Q1014. # country: Liberia ?...
10
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2answers
2k views

How to include sub-classes in a Wikidata SPARQL query? (example: when querying "bands", include "rock bands")

Here is my naive query for bridges: SELECT ?item WHERE { ?item wdt:P31 wd:Q12280. # Item's type is: bridge } Problem: It only returns a small fraction of all bridges, because railway bridges (...
2
votes
2answers
759 views

Get section and page title from a list of articles in Wikipedia via API

I want to get the different sections with their pages from the Wikipedia:Featured articles. By following this answer, I know I can get page titles of links as follows: https://en.wikipedia.org/w/...
6
votes
2answers
353 views

How to get urls of entries in wikipedia list articles?

I am trying to retrieve the URL of all articles listed inside wikipedia list articles. For concreteness lets consider the wikimedia list article List_of_American_scientists I know how to use the wiki ...
1
vote
1answer
60 views

Downloading wikipedia data from specific url

I want to download data from Wikipedia page I am a rookie at this and can'T find any relevant articles. Most of them are on downloading full Wikipedia. I need just one specific URL data.
1
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0answers
42 views

Race, cross-race, and cross culture tolerance data

Where can I find since done per-country data on people's attitudes towards people of other race and/or culture living within the same country and children of mixed race living within those countries. ...
3
votes
1answer
52 views

How to add a claim to an existing Wikidata item, from command line?

I want to add to Wikidata this claim: Embassy of Switerland, London - is operated by - Switzerland ... using my Linux command-line. Launching a web request via curl is OK too. How to do? I have ...
0
votes
1answer
48 views

Can SPARQL modify data like SQL? Or is it read-only?

Despite being a query language, SQL can perform DELETE/UPDATE/INSERT operations. Similarly, can SPARQL modify data? If find SPARQL convenient so I would like to use it to modify data, for instance ...
8
votes
1answer
332 views

wikidata: (when) will it be possible to query for wikipedia page links?

(When) will the following be possible: For a wikipedia page: get the list of all wikipedia links on that page with their respective wikidata IDs in a single query/API call. Receive additional ...
4
votes
2answers
203 views

wikipedia page: get the list of all links with their wikidata ids

For a Wikipedia page: is it possible to get the list of all Wikipedia links on that page with their respective wikidata IDs in a single query/API call? Optional: can additional information of the ...
4
votes
1answer
95 views

Is the Foundational Model of Anatomy Ontology an Open Data that can incorporated in other Open Databases?

At the moment I'm investigating the state of anatomical knowledge on Wikipedia/Wikidata. I noticed that the Foundational Model of Anatomy has a lot of useful data and while the ID's are usually ...
3
votes
1answer
172 views

Wikidata SPARQL, why an intermediate item is needed in this sample query?

In the Wikidata SPARQL samples, I found this query: What is the relation between Terrell Buckley and Miami Dolphins? Items used: Terrell Buckley (Q5571382), Miami Dolphins (Q223243) SELECT ?l WHERE ...
2
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0answers
35 views

Wikidata item add form template

Is it possible in wikidata to make a template form from which wikidata item is created? If this is not yet supported, what would be simplest way to make (program) such implementation integrated into ...
3
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0answers
197 views

What are the limitations of the Wikidata data model?

Wikidata data model is as follows: The following diagram is a more summarized version of it (source): All terms are defined here. I wonder what the limitations Wikidata data model are.
7
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3answers
674 views

Querying Wikidata : WDQ vs. WDQS / SPARQL

I'm new to Wikidata and I'm wanting to query it. The official page list several promising syntax / APIs : WDQ "Wikidata Query" syntax : http://wdq.wmflabs.org/api_documentation.html SPARQL syntax via ...
11
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2answers
1k views

How to output the description of Wikidata items using SPARQL?

I am trying to output a table using query.wikidata.org and SPARQL, with the name, birthdate, and brief description of notable, living Americans (i.e. those with wikidata entries) who will turn 100 ...
3
votes
1answer
147 views

Wikidata Query Service reliability

I encountered a partially incorrect result set from Wikidata Query Service. Requested Wikipedia article urls were missing for an item where this information existed, see https://stackoverflow.com/...
3
votes
1answer
114 views

Mapping a Wikimedia project URL to the corresponding Wikidata entity id

I am looking for the best method to map a given Wikipedia/Wikisource/Wikibooks/... URL to the corresponding Wikidata entity id (similar to this question but via API calls instead of a full data dump). ...