Shortcut: WD:WikiProject Source
Wikidata:Progetto fonti di metadati
WikiProject Source Metadata










L'obiettivo di WikiProject:Source Metadata è:
- Agire come servizio centrale per le attività in Wikidata relative alla citazione di dati e informazioni bibliografiche.
- Definire un insieme di proprietà che possa essere impiegato per le citazioni, infoboxes e Wikisource
- Analizzare e importare tutti i metadati rilevanti che attualmente si trovano dispersi in Commons, Wikipedia e Wikisource.
- Stabilire metodi per interagire con questi metadati in differenti progetti.
- Creare una grande base di dati bibliografici ad accesso libero dentro Wikidata.
- Promuovere, far crescere e mantenere l'interesse della comunità di utenti Wikimedia per l'inclusione e gestione dei metadati bibliografici in Wikidata.
There have been various proposals over the years for similar projects (see meta:WikiCite for details). Now that Wikidata is here, we can make it happen.
Current activities
- User:Research Bot has imported metadata for millions of academic works. Some data is stored as strings (such as author names)
- Go to Scholia, search on a name for an author, go to that page, append "/missing" to the URL (e.g., https://scholia.toolforge.org/author/Q6371926/missing) and then start resolving author strings. There are "/missing" pages for topics as well, e.g. as documented here, and venues have them too (example).
- Go to https://author-disambiguator.toolforge.org, look for an author name and create an item + link existing work items. See Organizing the public data about a researcher.
- Use Wikidata lists to curate sets of items, e.g. Journals without main subject or Works with famous authors but no publication date or Famous people with unidentified co-authors or Semi-disambiguated authors.
- Add main subjects to all scientific articles. So9q has written python command line tool that enables you to semi-automatically add main subjects.
Past activities
- A WikiCite Roadmap of the future of bibliographic data in Wikidata has been discussed
- so9q is writing a python bot to follow the Wikimedia eventstream and list DOIs and ISBNs found in Wikipedia articles mentioned in the stream. Next step it to import them if the bot request is approved..
Ongoing imports
- Citations between works are being imported by Citation graph bot 2; (no edits since March 2021)
- Researchers and works from the University of Leeds (Q503424) are being imported by Sic19;
- Daniel Mietchen is adding main subject (P921) to publications (this is not really an import, since we do not have appropriate tooling, e.g. as discussed here);
- Mahdimoqri is importing journals from Crossref (Q5188229) (dataset import page);
- John Cummings is importing journals from Directory of Open Access Journals (Q1227538) (dataset import page);
- valhallasw is importing arXiv ID (P818) using data from Unpaywall (Q38352586) (dataset import page). Help is welcome!
- Sic19 is adding education and employment data from ORCID to existing items that lack this information.
- Kpjas is importing titles and labels (in Polish) of scientific articles that have been published in Polish scientific journals (currently: Wiadomosci lekarskie (Warsaw, Poland : 1960) (Q27713857) and Psychiatria Polska (Q11830678), more to follow). PROBLEM: changing ranks of titles, Quickstatements won't.
Properties
See this subpage for more details.
Projects
- bib2wikidata is a tool being designed to import bibliographic data in Citation Style Language (Q824708) format into Wikidata.
- Open Access Signalling
- Citoid
- ORCID integration
- Proposed citation microformat for Wikipedias and other project content pages
- ProveIt - A powerful gadget that adds a visual interface to manage references, which is on its way to being connected to Wikidata
- Wikidata:Scholia, Scholia — A web service that displays scholarly profile pages based on Wikidata.
Wikidata:SourceMD, SourceMD - Import "source MetaData" via DOI/PMID/PMCIDunder repair- Fatameh - Import items to Wikidata about papers with content generated from places like EuropePMC, PubMed and Crossref.
- zotkat - Zotero export to QuickStatements format for importing in Wikidata
- Wikidata:WikiProject Source MetaData/Citation Typing Ontology - about CiTO annotations in Wikidata
Examples


Here is an example that creates a reference list with the articles
- Annotated checklist of the recent and extinct pythons (Serpentes, Pythonidae), with notes on nomenclature, taxonomy, and distribution (Q14405740)
- Tectonic map and overall architecture of the Alpine orogen (Q13416617)
- Uffenbach, Zacharias Konrad von (ADB) (Q20058533)
- Ecological guild evolution and the discovery of the world's smallest vertebrate (Q15567682)
based on the following code:
- {{#invoke:Cite | reflist | Q14405740 Q13416617 Q20058533 Q15567682 }}
This results in
«ГОСТ» examples:
Q21694395 →
Wobst R. Cryptology Unlocked — Chichester: John Wiley & Sons Ltd, 2007. — 554 p. — ISBN 978-0-470-06064-3Q21694386 →
Luciano D., Prichett G. Cryptology: From Caesar Ciphers to Public-Key Cryptosystems // The College Mathematics Journal — MAA, Taylor & Francis, 1987. — Vol. 18, Iss. 1. — P. 2–17. — ISSN 0746-8342; 1931-1346 — doi:10.2307/2686311
Tasks
For a list of specific tasks and todos (missing data, missing properties, cleanup tasks) see /ToDo
Workflow for profiling researchers
How to create a scholarly profile for a researcher in Wikidata
- Consider the platform
- Visit Wikidata
- Wikidata is the database which anyone can edit
- The Wikidata community curates this data
- Consider Wikicite
- Wikicite is the community project within Wikidata which curates source metadata
- The Wikicite community is a subset of the Wikidata community
- Consider how anyone accesses data
- Scholia is the specialized Wikidata tool for viewing academic profiles of people, topics, universities, etc
- If a profile looks good in Scholia, then the data is correctly formatted to be maximally open and accessible in Wikidata and the Semantic Web
- Making a profile look good in Scholia is the quickest and easiest way to format data once and for all
- the Wikidata Query Service is the general Wikidata tool for viewing groups of Wikidata content
- Everyone else, including big tech, big publishing, big government, etc scrape Wikidata and reuse this content, so what is in Wikidata goes everywhere else
- Scholia is the specialized Wikidata tool for viewing academic profiles of people, topics, universities, etc
- Visit Wikidata
- Identify or create the Wikidata item for the researcher to profile
- use basic Wikidata search by the person's name
- if the item for the person exists, then use it
- if the item does not exist, then create it
- follow the instructions for creating a profile for a human in Wikidata:WikiProject Biographies
- add enough information to uniquely identify this person by name and a few other characteristics
- If there is ambiguity because multiple people have the same name and characteristics, then create a new item. Items can be merged, and merging duplicates is easier to fix than separating mixed items.
- use basic Wikidata search by the person's name
- Try to add the ORCID, which is a unique scientific identifier
- visit https://orcid.org/
- search for the researcher
- if there is an easy and obvious match, then grab the ORCID
- go back to Wikidata
- click "add statement", enter ORCID, paste the ORCID, publish
- run ORCIDator, a Wikidata tool to import ORCID data into Wikidata
- Access through the SourceMD tool - https://www.wikidata.org/wiki/Wikidata:SourceMD
- further documentation at https://www.wikidata.org/wiki/Wikidata:ORCIDator
- there is often no ORCID, or the ORCID is blank, or there is ambiguity - pass if this is the case
- Use the "Wikidata Author Disambiguation tool"
- This will match papers indexed in Wikidata to the target researcher
- https://tools.wmflabs.org/author-disambiguator/
- Enter the target researcher's name
- in 2019 the tool is clunky
- try name variations, including initials, or whatever is likely in an academic paper
- Identify name variations
- go back to the Wikidata item for the person
- add the variations to the "also known as" field at the top of the item
- noting the variations greatly assists ongoing maintenance and profile updates
- Enter the target researcher's name
- Wait
- Wikidata is a nonprofit project of the Wikimedia Community
- technical infrastructure is modest; in 2019 updates typically take 5-30 minutes
- Like Wikipedia, Wikidata depends on volunteer contributors of content and donor funding
- thanks for editing, it is the most valuable contribution anyone can make
- View incomplete profile on Scholia
- enter the person's name - it should autocomplete
- profile generated based on available data
- use Scholia's "missing content" tool
- this is weird - access by adding "/missing" at the end of the scholia URL
- the missing tool is actually a collection of tools which search and suggest possible data to add to the profile
- building out the network of collaborators is easy from here
- consider building profiles for top co-authors
- consider building profiles for people who commonly cite target researcher's papers
Possible Data Collaborators

Some possible Data Collaborators have expressed interest on working on source metadata in Wikidata: others might usefully be approached.
OCLC, which runs WorldCat, is very keen on collaborating with Wikidata; User:Maximiliankleinoclc wrote a letter about the possibilities.
ContentMine has some excellent open software tools, which we could use to let Wikidata answer queries like "List all the review papers ever written on malaria vaccines", "List all the articles that mention Lygodactylus williamsii", "List every paper ever written by John Tuzo Wilson" and "List all the papers cited in Wikipedia articles that have been retracted". They listed "An Open Bibliography of science, updated daily" as a "wikiwish" at Wikimania 2014, apparently unaware that this project has been started at a slightly earlier workshop.
PLOS has an API for RichCitations, which contains metadata on all PLOS papers up through late 2014. Rich Citations is a novel structured format to express each citation as a data element, and it includes a set of useful, additional terms specific to scholarly literature that enable research about the knowledge web citations create. It also includes a display feature much like Reference Tooltips, but linked to a database (which is open licensed), so it can update metainformation. They presented at Wikimania 2014 and are keen to collaborate and share their results with us.
Zotero is interested in the idea of a proofread metadata source. Some Zotero users currently upload to cloud storage; we might build tools to let them upload here, instead. CiteseerX has a large open-licensed database of article metadata, and might want to set up an exchange, but have not responded to e-mails.
The Cochrane Collaboration is developing an API to its metadata (they were contacted about this project in July 2014, so this use case may have helped shape the API). They produce large amounts of non-conventional metadata on works they review, and on works they produce, both of which Wikimedians quote.
Institutional repositories are also increasingly interested in open APIs and linked databases, and seem generally receptive to this project. The university-run academic search engine BASE aggregates and normalizes these repositories and makes its data collection available for non-commercial purposes.
Resources
Subpages
The following subpages belong to the project:
- WikiProject Source MetaData/Academic Journals
- WikiProject Source MetaData/ArticlePlaceholder
- WikiProject Source MetaData/Bibliographic metadata for scholarly articles in Wikidata
- WikiProject Source MetaData/Citation Typing Ontology
- WikiProject Source MetaData/Conferences
- WikiProject Source MetaData/Dagbani
- WikiProject Source MetaData/Indexes
- WikiProject Source MetaData/Journals by language
- WikiProject Source MetaData/Journals by publisher
- WikiProject Source MetaData/Literature surveys
- WikiProject Source MetaData/More/Participants
- WikiProject Source MetaData/Participants
- WikiProject Source MetaData/Research Journals in Switzerland
- WikiProject Source MetaData/Research in Switzerland
- WikiProject Source MetaData/Researchers in Switzerland
- WikiProject Source MetaData/Source types
- WikiProject Source MetaData/Standards
- WikiProject Source MetaData/Statistics
- WikiProject Source MetaData/Theses and dissertations
- WikiProject Source MetaData/Theses by institution
- WikiProject Source MetaData/ToDo
- WikiProject Source MetaData/Tool audit
- WikiProject Source MetaData/Wikidata lists
- WikiProject Source MetaData/Wikidata lists/Author name strings matched to author items using Stated As
- WikiProject Source MetaData/Wikidata lists/Author name strings that are on multiple papers with at least three identical co-authors
- WikiProject Source MetaData/Wikidata lists/Author name strings that are on multiple papers with at least three identical co-authors (by author name string)
- WikiProject Source MetaData/Wikidata lists/Author name strings that are on multiple papers with at least three identical co-authors (by co-authors)
- WikiProject Source MetaData/Wikidata lists/Authors missing P108 (employer) or P69 (educated at) or P184 (doctoral advisor)
- WikiProject Source MetaData/Wikidata lists/Authors of multiple works that do not have a main subject statement
- WikiProject Source MetaData/Wikidata lists/Authors with ORCID
- WikiProject Source MetaData/Wikidata lists/Corporate authors
- WikiProject Source MetaData/Wikidata lists/Famous people with unidentified co-authors
- WikiProject Source MetaData/Wikidata lists/Items about HTLV-1
- WikiProject Source MetaData/Wikidata lists/Items about RNA-Seq
- WikiProject Source MetaData/Wikidata lists/Items about Zika virus or fever
- WikiProject Source MetaData/Wikidata lists/Items about earthquake
- WikiProject Source MetaData/Wikidata lists/Items about heterosis
- WikiProject Source MetaData/Wikidata lists/Items citing other items
- WikiProject Source MetaData/Wikidata lists/Items missing JSTOR ID
- WikiProject Source MetaData/Wikidata lists/Items missing JSTOR ID/raw
- WikiProject Source MetaData/Wikidata lists/Items missing JSTOR ID/row
- WikiProject Source MetaData/Wikidata lists/Items with arXiv IDs
- WikiProject Source MetaData/Wikidata lists/Journals without main subject
- WikiProject Source MetaData/Wikidata lists/Long author name strings used on multiple works
- WikiProject Source MetaData/Wikidata lists/Main subjects of publications with unidentified authors
- WikiProject Source MetaData/Wikidata lists/Periodicals with no main subject statement
- WikiProject Source MetaData/Wikidata lists/Popular author name strings on works about taxa
- WikiProject Source MetaData/Wikidata lists/Popular author name strings on works about topics that have a Disease Ontology ID
- WikiProject Source MetaData/Wikidata lists/Popular author name strings on works about topics that have a geolocation
- WikiProject Source MetaData/Wikidata lists/Popular strings in titles of works with a given author name string
- WikiProject Source MetaData/Wikidata lists/Publications where all authors have an ORCID
- WikiProject Source MetaData/Wikidata lists/Published today
- WikiProject Source MetaData/Wikidata lists/Scholarly journals
- WikiProject Source MetaData/Wikidata lists/Semi-disambiguated authors
- WikiProject Source MetaData/Wikidata lists/Unidentified authors on publications about the Zika virus
- WikiProject Source MetaData/Wikidata lists/Usage of Scholia in Template Medical resources on the English Wikipedia
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/Basque Wikipedia
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/Cross-wiki
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/Cross-wiki/List
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/Cross-wiki/Query
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/English Wikipedia
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/English Wikipedia/Query
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/English Wikipedia/With CC0 images
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/English Wikisource
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/Macedonian Wikipedia
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/Malayalam Wikipedia
- WikiProject Source MetaData/Wikidata lists/Usage of Template Scholia/Swedish Wikipedia
- WikiProject Source MetaData/Wikidata lists/Works co-authored by famous people and unidentified authors
- WikiProject Source MetaData/Wikidata lists/Works that are referenced and cited but do not have a main subject
- WikiProject Source MetaData/Wikidata lists/Works with famous authors but no main subject statement
- WikiProject Source MetaData/Wikidata lists/Works with famous authors but no publication date
- WikiProject Source MetaData/Wikidata lists/Works with missing statements for both main subject and publication date
- WikiProject Source MetaData/ar
- WikiProject Source MetaData/da
- WikiProject Source MetaData/de
- WikiProject Source MetaData/en
- WikiProject Source MetaData/es
- WikiProject Source MetaData/fr
- WikiProject Source MetaData/id
- WikiProject Source MetaData/it
- WikiProject Source MetaData/ja
- WikiProject Source MetaData/ms
- WikiProject Source MetaData/nl
- WikiProject Source MetaData/nonexistent PMIDs
- WikiProject Source MetaData/nonexistent PMIDs/1-10000000
- WikiProject Source MetaData/nonexistent PMIDs/10000000-14000000
- WikiProject Source MetaData/nonexistent PMIDs/14000000-17000000
- WikiProject Source MetaData/nonexistent PMIDs/17000000-20000000
- WikiProject Source MetaData/nonexistent PMIDs/20000000-22000000
- WikiProject Source MetaData/nonexistent PMIDs/22000000-24000000
- WikiProject Source MetaData/nonexistent PMIDs/24000000-27000000
- WikiProject Source MetaData/nonexistent PMIDs/27000000-30000000
- WikiProject Source MetaData/nonexistent PMIDs/30000000-
- WikiProject Source MetaData/pl
- WikiProject Source MetaData/ru
- WikiProject Source MetaData/tr
- WikiProject Source MetaData/uk
- WikiProject Source MetaData/ur
- WikiProject Source MetaData/zh
Contact
- IRC channel: #wikidata-wpsm (webchat now!) and #wikicite (webchat now!)
- Mailing list: wikicite-discuss
- Twitter: search for wikicite #WikiCite or @WikiCite
Participants
The first list has now reached the maximum number possible for {{Ping project}}
. Please therefore add your name to the second list below.
To ping both lists, use {{Ping project|Source MetaData}}
and {{Ping project|Source MetaData/More}}
in two different posts.
The participants listed below can be notified using the following template in discussions:
{{Ping project|Source MetaData}}
- Mattsenate (talk) 13:11, 8 August 2014 (UTC)
- KHammerstein (WMF) (talk) 13:15, 8 August 2014 (UTC)
- Mitar (talk) 13:17, 8 August 2014 (UTC)
- Mvolz (talk) 18:07, 8 August 2014 (UTC)
- Daniel Mietchen (talk) 18:09, 8 August 2014 (UTC)
- Merrilee (talk) 13:37, 9 August 2014 (UTC)
- Pharos (talk) 14:09, 9 August 2014 (UTC)
- DarTar (talk) 15:46, 9 August 2014 (UTC)
- HLHJ (talk) 09:11, 11 August 2014 (UTC)
- Blue Rasberry 18:02, 11 August 2014 (UTC)
- JakobVoss (talk) 12:23, 20 August 2014 (UTC)
- Finn Årup Nielsen (fnielsen) (talk) 02:06, 23 August 2014 (UTC)
- Jodi.a.schneider (talk) 09:24, 25 August 2014 (UTC)
- Abecker (talk) 23:35, 5 September 2014 (UTC)
- Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 14:21, 24 October 2014 (UTC)
- Mike Linksvayer (talk) 23:26, 18 October 2014 (UTC)
- Kopiersperre (talk) 20:33, 20 October 2014 (UTC)
- Jonathan Dugan (talk) 21:03, 20 October 2014 (UTC)
- Hfordsa (talk) 19:26, 5 November 2014 (UTC)
- Vladimir Alexiev (talk) 15:09, 23 January 2015 (UTC)
- Runner1928 (talk) 03:25, 6 May 2015 (UTC)
- Pete F (talk)
- econterms (talk) 13:51, 19 August 2015 (UTC)
- Sj (talk)
- TomT0m
- addshore 17:43, 18 January 2016 (UTC)
- Bodhisattwa (talk) 16:08, 29 January 2016 (UTC)
- Ainali (talk) 16:51, 29 January 2016 (UTC)
- Shani Evenstein (talk) 21:29, 5 July 2018 (UTC)
- Skim (talk) 07:17, 6 November 2018 (UTC)
- PKM (talk) 23:19, 19 November 2018 (UTC)
- Ocaasi (talk) 22:19, 29 November 2018 (UTC)
- Trilotat Trilotat (talk) 15:43, 16 February 2019 (UTC)
- NAH
- Iwan.Aucamp
- Alessandra Boccone
- Pablo Busatto (talk) 05:40, 23 June 2020 (UTC)
- Blrtg1 (talk) 17:20, 23 July 2020 (UTC)
- Kosboot (talk) 21:32, 23 July 2020 (UTC)
- Matlin (talk) 09:38, 11 August 2020 (UTC)
- Carrierudd(talk) 11:44, 3 November 2020 (UTC)
- So9q (talk) 11:35, 16 January 2021 (UTC)
- pdesai (talk) 16:00, 8 February 2021 (UTC)
Donald Trung/徵國單 (討論 🀄) (方孔錢 💴) 18:43, 17 May 2021 (UTC)
The participants listed below can be notified using the following template in discussions:
{{Ping project|Source MetaData}}
- LeadSongDog (talk) 21:42, 23 March 2016 (UTC)
- RobLa-WMF (talk) 01:24, 25 March 2016 (UTC)
- Kosboot (talk) 20:45, 30 March 2016 (UTC)
- Sydney Poore/FloNight♥♥♥♥ 15:10, 14 April 2016 (UTC)
- Peaceray (talk) 18:40, 28 April 2016 (UTC)
- PKM (talk) 16:29, 1 May 2016 (UTC)
- Aubrey (talk) 12:42, 25 August 2016 (UTC)
- Chiara (talk) 12:47, 25 August 2016 (UTC)
- Marchitelli (talk) 19:02, 1 September 2016 (UTC)
- YULdigitalpreservation (talk) 17:44, 9 December 2016 (UTC)
- Satdeep Gill (talk) 14:59, 2 February 2017 (UTC)
- Raymond Ellis (talk) 16:06, 1 April 2017 (UTC)
- Crazy1880 (talk) 18:21, 16 June 2017 (UTC)
- T Arrow (talk) 07:55, 22 June 2017 (UTC)
- GerardM (talk) 08:25, 30 July 2017 (UTC) With a particular interest of opening up sources about Botany and opening up any freely licensed publications.
- Clifford Anderson (talk) 18:26, 11 August 2017 (UTC)
- Jsamwrites (talk) 07:52, 27 August 2017 (UTC)
- Krishna Chaitanya Velaga (talk) 09:52, 19 September 2017 (UTC)
- Capankajsmilyo (talk) 18:32, 19 September 2017 (UTC)
- Hsarrazin (talk) 20:41, 15 October 2017 (UTC)
- Mlemusrojas (talk) 10:15, 6 December 2017 (UTC)
- Samat (talk)
- Ivanhercaz
(Talk) 20:27, 25 December 2017 (UTC)
- Simon Cobb (User:Sic19 - talk page) 21:20, 21 January 2018 (UTC)
- Mahdimoqri (talk) 20:22, 26 March 2018 (UTC)
- Maria zaos (talk) 18:45, 9 April 2018 (UTC)
- Jaireeodell (talk) 14:07, 23 April 2018 (UTC)
- Egon Willighagen (talk) 12:29, 10 May 2018 (UTC)
- RobinMelanson (talk) 2:13, 25 November 2018 (UTC)
- Vladimir Alexiev (talk) 03:02, 4 December 2018 (UTC) interested, in particular because of TRR project https://m.wikidata.org/wiki/Q56259739
- Maxlath (talk) 18:36, 6 January 2019 (UTC)
- Dcflyer (talk) 21:38, 26 January 2019 (UTC)
- Trilotat Trilotat (talk) 15:39, 16 February 2019 (UTC)
- Mfchris84 (talk) 05:37, 18 April 2019 (UTC)
- Salgo60 (talk)
- Walkuraxx (talk) 14:58, 18 July 2019 (UTC)
- NAH
- FULBERT (talk) 17:14, 10 November 2019 (UTC)
- Wolfgang8741 (talk) 20:35, 19 April 2020 (UTC)
- Csisc (talk) 17:46, 26 April 2020 (UTC)
- Phoebe (talk) 16:26, 24 September 2020 (UTC)
- Bitofdust (talk) 16:15, 20 January 2021 (UTC)
- Dick Bos (talk) 07:52, 23 March 2021 (UTC)
- Rtnf (talk) 12:34, 19 July 2021 (UTC)
- Mathieu Kappler (talk) 11:38, 6 September 2021 (UTC)
- DrThneed (talk) 23:10, 13 April 2023 (UTC)
Historical discussions
There have been historical discussions about Wikidata hosting information about the sources of data.
- Wikidata:Requests_for_comment/Source_items_and_supporting_Wikipedia_sources - Confirmed that sources could be typical items in Wikidata, and that a separate sort of item only for sources ("S" instead of "Q") need not be created as a space only for sources
- Wikidata:Requests for comment/Sourcing requirements for bots - Confirmed that bots set standards for best practices, and that claims made through bots are best backed with sources.
- Wikidata:Requests_for_comment/References_and_sources - Confirmed Help:Sources as an official project guideline
- m:Wikidata/Notes/Bibliographic data
- Wikipedia as the front matter to all research - Discussed role of Wikidata in handling citations across Wikimedia projects