An RfC has come along proposing to do away with Persondata. As someone who has invested a lot of time in using Persondata I am in principle against this proposal. Wikipedia:Village pump (proposals)#RfC: Should Persondata template be removed from articles?
The alternative of Wikidata is certainly the way forward, but my impression is that it will not be kept up to date. This is just a gut feeling, so I have produced statistics to see the actual position.
My database extracted from Persondata
editI have a personal database of every article that holds a Persondata template, currently 1153424 records. For easier handling, each record is randomly allocated to one of 255 blocks. I have randomly chosen block 177 for my analysis, which contains 4548 records.
The current status of this block is
1226 Complete living Complete = full date of birth 514 Complete non-living and full date of death 204 Validated All checks pass, but accurate birth/death dates are not known 2604 Various errors
Apart from extracting the birth and death dates, my software does various validations, such as categories not agreeing with the data. 2604 seems a high percentage, but the majority of these are minor such as no place of death but not in the missing place of death category. Note, dates that are just a year are counted as not known.
Comparison of Persondata and Wikidata
editI took all the articles in block 177, and looked up birth/death dates on Wikidata.
96 Birth dates do not match between databases 141 Birth date only on Persondata 187 Birth date only on Wikidata * 424 in error (somewhere) 40 Death dates do not match between databases 47 Death date only on Persondata 125 Death date only on Wikidata * 212 in error (somewhere)
Out of the 4548 records analysed,
3140 records have a full date of birth in Persondata, Wikidata or both 1344 records have a full date of death in Persondata, Wikidata or both
The conclusion is that where a birth/death date is known, 13% of births and 15% of deaths show a discrepancy between the two databases.
The full list of discrepancies are listed below. My plan is to correct these and make a note where the fault lies. This should give an indication of work required to make Wikidata reliable.
Results
editI manually check the article to see why there is a difference and make a comment. The correct column shows which database was correct, P = Persondata, D = Wikidata, ? = unknown due to conflicting information.
Mismatched birth dates between Persondata and Wikidata
edit| Wikipedia article | Persondata d.o.b. | Wikidata d.o.b. | Correct | Comment |
|---|---|---|---|---|
| Paul Martin (baseball) | 1932-03-09 | 1932-03-10 | P | Wikipedia edited 22 June 2013 with comment according to Baseball Reference, Retrosheet |
| Laine MacNeil | 1996-10-28 | 1997-11-21 | P | Wikipedia edited 6 September 2013, referring to a tweet made by the actress |
| Charmaine Brooks | 1971-02-07 | 1970-02-07 | D | Persondata out of sync with article following edit by IP on 4 June 2012 |
| Adhemar (footballer) | 1972-04-27 | 1972-04-22 | ? | Date varies between interwikis |
| Nikolai Stoletov | 1834-11-13 | 1831-11-14 | ? | Wikidata sourced from Russian Wikipedia, which shows a different data to enwiki. |
| Marietta Alboni | 1823-03-06 | 1826-03-06 | ? | Sources show different birth years. |
| Ricardo Ernesto Ahlf | 1986-12-23 | 1986-10-23 | ? | Article has 2 different date of birth since its creation |
| Andy Smailes | 1986-05-21 | 1896-05-21 | D | Mistype in Persondata |
| Sergei Winogradsky | 1856-09-01 | 1856-09-13 | ? | Russian wikipedia has a different date than enwiki |
| Delphine von Schauroth | 1814-03-13 | 1813-03-13 | D | Mistype in Persondata |
| Petr Kouba | 1969-01-28 | 1969-11-28 | ? | Article has two different dates |
| Jannie van Eyck-Vos | 1944-06-21 | 1936-01-19 | D | Wrong date in Persondata |
| Reinaldo Ventura | 1978-05-16 | 1978-05-26 | D | Wrong date in Persondata |
| Amy Tuck | 1963-07-09 | 1963-07-08 | D | Persondata not synced with article |
| Ahmed bin Saeed Al Maktoum | 1958-12-22 | 1958-11-03 | ? | dewiki disagrees with enwiki |
| Robert Morris (financier) | 1734-01-20 | 1734-01-31 | P | Infobox correction not corrected on Wikidata |
| Pascual Pérez (boxer) | 1926-03-04 | 1926-05-04 | D | Incorrect figure in Persondata |
| Georges de la Nézière | 1878-07-18 | 1878-07-31 | ? | Date varies between wikis |
| Aleksandr Lopukhin | 1852-10-10 | 1852-10-22 | P | Wikidata appears to have used Russian calendar but called it Gregorian |
| Adam Gontier | 1978-05-25 | 1978-05-21 | D | Persondata out of sync with article |
| Friedrich Hitzig | 1811-11-08 | 1811-04-08 | ? | Wikidata has used a date from LCCN, which does not match date in article. |
| Baptiste Giabiconi | 1989-12-09 | 1989-11-09 | D | Persondata out of sync with article |
| Ismaila Lassissi | 1969-09-11 | 1985-02-16 | P | Incorrect date in infobox |
| Igor Cavalera | 1970-09-04 | 1970-09-24 | P | Birth date on enwiki edited 4 September 2013 - other wikis show this date. |
| Tony Beckley | 1927-10-07 | 1929-10-07 | D | Persondata not synced with article |
| Starling Marte | 1988-10-10 | 1988-10-09 | D | Persondata not synced with article |
| Ms. Triniti | 1974-03-06 | 1978-03-06 | D | Vandalism? on Persondata |
| Pierre Guérin de Tencin | 1679-08-22 | 1680-08-22 | ? | Different years from different sources. |
| Heinrich Riso | 1883-05-18 | 1882-06-30 | D | Persondata out of sync with article |
| Paul Bogart | 1919-11-13 | 1919-11-21 | D | Persondata out of sync with article |
| Gianfranco Baraldi | 1935-09-29 | 1935-08-26 | ? | Two dates in article |
| Lar Foley | 1938-11-04 | 1938-11-23 | D | Persondata out of sync with article |
| Pete Holohan | 1959-07-25 | 1298-07-25 | P | Dodgy bot gave football player a medieval birth date! |
| Matthew Porterfield | 1977-10-06 | 1977-10-07 | ? | dewiki different to enwiki |
| Sandy Mutch | 1884-12-09 | 1884-08-13 | P | Wikipedia updated, Wikidata still shows old date. |
| Hector Tiberghien | 1888-02-19 | 1890-02-18 | ? | Dates differ between wikis |
| Sudha Shivpuri | 1938-07-14 | 1937-07-14 | D | Persondata out of sync with article |
| William Patrick Fyfe | 1955-02-27 | 1955-02-22 | ? | Two different dates in article |
| Arthur Mignault | 1866-09-29 | 1865-09-29 | D | Persondata out of sync with article |
| Paolo Frascatore | 1992-02-04 | 1992-01-04 | D | Persondata out of sync with article |
| Michael Halika | 1978-10-11 | 1978-11-11 | D | Persondata out of sync with article |
| Omar Ali Juma | 1941-06-26 | 1941-06-21 | P | Can not find where wikidata got date from |
| Gerald Phiri | 1988-06-10 | 1988-10-06 | D | ydm format incorrectly used on Persondata |
| Rudolf Potsch | 1937-05-15 | 1937-06-15 | P | Correction to date did not reach wikidata |
| Oleg Artemyev | 1971-12-28 | 1970-12-28 | D | Persondata not synced with article |
| Countess Louise Henriette of Nassau | 1627-12-07 | 1627-11-27 | ? | Conflicting dates in article |
| Sharad Yadav | 1947-07-01 | 1947-10-01 | P | No idea where wikidata date came from, except that I have seen a few strange entries by GPUBot. |
| Yaseen Al-Bakhit | 1989-03-24 | 1988-01-01 | P | Date was vandalised a few months ago. |
| Pacita Abad | 1946-10-05 | 1946-09-05 | P | Article updated, did not reach wikidata |
| Ayoub Skouma | 1987-03-22 | 1988-07-09 | ? | Multiple dates |
| Jules Jamin | 1818-05-31 | 1818-05-30 | ? | enwiki different to ruwiki |
| Marco Pérez (Liechtenstein footballer) | 1978-03-21 | 1976-04-21 | P | revised date not on wikidata |
| René-Pierre Quentin | 1943-08-05 | 1943-07-05 | ? | itwiki is different to enwiki |
| Don Wildman | 1961-03-27 | 1961-03-21 | ? | Two dates in article |
| Laban Coblentz | 1961-07-21 | 1960-07-21 | P | GPUbot again seems to have added an incorrect year? |
| Georgi Todorov (weightlifter) | 1951-12-04 | 1952-12-04 | ? | Different years on different wikis |
| Jan Rokita | 1959-06-18 | 1959-07-18 | ? | Two dates on Wikidates (I had not allowed for this) |
| Lucrezia Bori | 1887-12-24 | 1887-02-24 | ? | Two dates on Wikidata |
| June Hutton | 1919-08-11 | 1920-08-11 | ? | enwiki updated with new information, other wikis not updated. |
| Pom (comics) | 1919-11-16 | 1919-11-06 | P | Looks like a mistype into wikidata |
| Henry Koning | 1960-06-20 | 1960-06-29 | D | Persondata out of sync |
| Dennis Flores | 1993-09-18 | 1993-09-23 | D | Persondata out of sync |
| Àngel Rangel | 1982-10-28 | 1982-11-28 | P | Month updated in January 2014, not updated in wikidata |
| Facundo Crovo | 1975-12-11 | 1987-12-11 | D | Persondata out of sync |
| Fady Maalouf | 1979-04-20 | 1976-04-20 | ? | Integrated Authority File has different year to Wikipedia |
| Frank Pietrangelo | 1964-12-17 | 1965-12-17 | ? | Italian and English Wikipedias have differing dates |
| Camille Mana | 1986-09-01 | 1983-09-01 | ? | Wikipedia article keeps changing dates, but no reliable reference given |
| Andrea Beltratti | 1959-02-19 | 1959-02-09 | D | Persondata out of sync |
| Matt Freeman | 1966-04-23 | 1966-06-14 | ? | Edit warring with a "Personal friend" |
| Theodor Krancke | 1893-03-30 | 1893-03-20 | ? | Two dates on Wikidata |
| Antal Nagy (footballer born 1956) | 1957-10-17 | 1956-10-17 | D | Persondata out of sync |
| Leon Jakimič | 1975-02-23 | 1975-05-23 | P | Czech Wikipedia had been updated, not wikidata |
| Alexander Valeryevich Dyukov | 1967-12-03 | 1967-12-13 | ? | Russian Wikipedia different to English |
| Paul Whitehouse | 1958-05-20 | 1958-05-17 | D | Persondata out of sync with article |
| Ernst G. Straus | 1922-02-25 | 1922-02-15 | ? | Integrated Authority File has a different date to Wikipedia |
| Saigon (rapper) | 1977-07-13 | 1977-06-01 | P | Wikipedia updated, not wikidata |
| Heine Totland | 1970-06-19 | 1970-10-16 | D | Persondata out of sync |
| Karl-Adolf Hollidt | 1891-04-25 | 1891-04-28 | ? | Two dates in article |
| Robert Jeangerard | 1933-06-20 | 1932-06-20 | P | Date of birth correct enwiki, not wikidata |
| Dominick Cruz | 1985-03-09 | 1985-09-03 | D | Persondata had incorrect date |
| Jon Secada | 1961-10-04 | 1962-10-04 | D | Persondata out of sync |
| Kristy Wu | 1982-10-12 | 1982-10-11 | D | Persondata out of sync |
| Katherine of England | 1523-11-25 | 1253-11-25 | D | Persondata out of sync |
| Jonny Magallón | 1981-11-21 | 1981-10-21 | ? | Russian and English wikipedia showing different dates |
| Lekain | 1728-04-14 | 1729-03-31 | ? | Wikidata has multiple dates |
| Alec Blakeman | 1918-06-11 | 1936-04-01 | ? | Conflicting dates in Wikipedia article |
| Fikret Orman | 1967-01-01 | 1967-11-04 | D | Article was using 1st January as a default |
| Thanasis Kolitsidakis | 1966-11-20 | 1966-11-21 | D | Persondata was out of sync |
| Jennifer Hanson | 1976-08-10 | 1973-08-10 | D | Wikipedia was updated to 1976 by a user called jenniferhanson, but the source shows 1973 |
| Rhea Chakraborty | 1992-07-01 | 1988-07-01 | P | Again GPUBot picked up incorrect year which I cannot find in history |
| Aleksei Maklakov | 1962-01-06 | 1961-01-06 | ? | Russian Wikipedia disagrees with English version |
| Karl Davydov | 1838-03-03 | 1838-03-17 | D | Persondata not using Gregorian date and no qualifiers |
| Edward B. Teague III | 1949-11-25 | 1949-11-15 | ? | Different dates in article |
| Cindy Rondón | 1988-11-12 | 1987-11-12 | ? | Date varies between English and other language Wikis |
| José Andreu García | 1937-09-18 | 1924-09-18 | ? | Different dates in article |
| George Raynor | 1907-01-13 | 1907-07-13 | P | Another wikidata insert with an incorrect date |
Mismatched death dates between Persondata and Wikidata
edit| Wikipedia article | Persondata d.o.d. | Wikidata d.o.d. |
|---|---|---|
| Carl Friedberg | 1955-09-09 | 1955-09-08 |
| Leopold Lichtenberg | 1935-05-16 | 1935-05-17 |
| Ann Richards | 2006-09-13 | 2006-09-14 |
| Hawa Yakubu | 2007-03-19 | 2007-03-20 |
| Joe Stecher | 1974-04-29 | 1974-03-29 |
| Mohammad Mohammadullah | 1999-11-11 | 1999-11-12 |
| Sergei Winogradsky | 1953-02-25 | 1953-02-24 |
| William Giffard | 1129-01-25 | 1129-01-23 |
| Joseph Sterling Bridwell | 1966-05-09 | 1966-05-08 |
| Susenyos I | 1632-09-07 | 1632-09-17 |
| Robert Morris (financier) | 1806-05-08 | 1806-05-09 |
| Vladimir Rebikov | 1920-10-01 | 1920-08-04 |
| Einar Gerhardsen | 1987-11-19 | 1987-09-19 |
| Jean-Joseph Mouret | 1738-12-22 | 1738-12-20 |
| Photius, Metropolitan of Moscow | 1431-02-07 | 1431-07-02 |
| Georg von Metaxa | 1944-12-12 | 1945-04-12 |
| Lar Foley | 2003-03-04 | 2003-05-04 |
| Conrad I, Duke of Merania | 1159-02-18 | 1159-02-08 |
| Hector Tiberghien | 1951-08-17 | 1951-08-16 |
| John I. Cox | 1946-09-05 | 1946-09-04 |
| Howard Purcell | 1981-04-01 | 1981-04-24 |
| Kaúlza de Arriaga | 2004-02-02 | 2004-02-03 |
| Antoine François, comte de Fourcroy | 1809-12-17 | 1809-12-16 |
| Magdalena Sibylla of Neidschutz | 1694-04-14 | 1694-04-04 |
| Pierre Naville | 1993-04-24 | 1993-03-24 |
| Nino Pirrotta | 1998-01-20 | 1998-01-22 |
| Sybil Plumlee | 2012-01-06 | 1911-04-29 |
| Tomás Regalado (Salvadoran politician) | 1906-07-07 | 1906-07-11 |
| Jovan Grković-Gapon | 1912-10-08 | 1912-10-09 |
| Emil Schlagintweit | 1904-10-29 | 1904-10-20 |
| Henry Havelock | 1857-11-29 | 1857-11-24 |
| Hugo Blaschke | 1959-12-06 | 1960-09-15 |
| Shlomo Carlebach (musician) | 1994-10-21 | 1994-10-20 |
| Besik Kudukhov | 2013-12-28 | 2013-12-29 |
| Adhemar Schwitzguébel | 1895-07-23 | 1895-01-23 |
| Katherine of England | 1527-05-03 | 1257-05-03 |
| Gusty Spence | 2011-09-24 | 2011-09-25 |
| Karl Davydov | 1889-02-14 | 1889-02-25 |
| Gottlieb von Jagow | 1935-01-01 | 1935-01-11 |
| Anouar Abdel-Malek | 2012-06-15 | 2012-06-17 |
Birth dates only on Persondata
edit| Wikipedia article | Persondata d.o.b. | Correct | Comment |
|---|---|---|---|
| Michel Tremblay (politician) | 1933-03-28 | P | Not copied across |
| Wharton Barker | 1846-05-01 | P | Not copied across |
| Kenneth Weishuhn | 1997-05-27 | P | Not copied across |
| Patricia Verne Kailis | 1933-08-19 | P | Not copied across |
| Zara Northover | 1984-03-06 | P | Not copied across |
| Yang Dong-hyun | 1986-03-28 | P | Not copied across |
| Percival Barnett | 1889-10-08 | P | Not copied across |
| Poul Erik Petersen | 1927-05-07 | P | Not copied across |
| John Wesley Fitzgerald | 1850-10-22 | P | Not copied across |
| Zhang Na (footballer) | 1984-03-10 | P | Not copied across |
| William Lorenz | 1882-02-15 | P | Not copied across |
| Floyd Curry | 1925-08-11 | P | Not copied across |
| Paul Atkinson (guitarist) | 1946-03-19 | P | Not copied across |
| William Johnston Almon | 1816-01-27 | P | Not copied across |
| Numskull | 1975-01-31 | P | Not copied across |
| Ambrose Flack | 1902-03-16 | P | Not copied across |
| Hawa Yakubu | 1948-03-24 | P | Not copied across |
| William R. Furlong | 1881-05-26 | P | Not copied across |
| Murray Golden | 1912-10-24 | P | Not copied across |
| Umetsugu Inoue | 1923-05-31 | P | Not copied across |
| Ramesh Agarwal | 1962-09-06 | P | Not copied across |
| Alexander Scoles | 1844-11-30 | P | Not copied across |
| Álvaro Velasco (weightlifter) | 1971-03-03 | P | Not copied across |
| Allen G. Debus | 1926-08-16 | P | Wikidata only has year of birth |
| Saimir Tahiri | 1979-10-30 | P | Not copied across |
| Harvey Picker | 1915-12-08 | P | Not copied across |
| Örlygur Smári | 1971-06-30 | P | Not copied across |
| Henri René | 1906-12-29 | P | Not copied across |
| Charlton Monypenny | 1867-11-04 | P | Not copied across |
| Arthur Tunstall | 1922-02-22 | P | Not copied across |
| Fred White (footballer born 1916) | 1916-12-05 | P | Not copied across |
| Percival Kinnear Wise | 1885-04-17 | P | Not copied across |
| Prasad Sinha | 1911-09-26 | P | Not copied across |
| Emjo Basshe | 1898-01-20 | P | Not copied across |
| Theodore Sedgwick Fay | 1807-02-10 | P | Not copied across |
| Władysław Siemaszko | 1919-06-08 | P | Not copied across |
| Claude Cornish | 1888-08-31 | P | Not copied across |
| Pascal Richard (skeleton racer) | 1972-03-27 | P | Not copied across |
| Johannes Nolton | 1888-10-27 | P | Not copied across |
| Harold Elverston | 1866-12-26 | P | Not copied across |
| Nicolas Minorsky | 1885-09-24 | P | Not copied across |
| Jørgen Blydt | 1868-03-14 | P | Not copied across |
| Eileen Hendriks | 1887-11-03 | P | Not copied across (was copied by bot in last few days) |
| Edmundo Prati | 1889-04-17 | P | Not copied across |
| Yehuda Chitrik | 1899-08-28 | P | Not copied across |
| Walter Spencer-Stanhope (1749–1822) | 1749-02-04 | P | Not copied across |
| Henry Sweetser Burrage | 1837-01-07 | P | Not copied across (was copied by bot in last few days) |
| Herbert Marcus | 1878-09-06 | P | Wikidata only has year of birth |
| Yu Horiuchi | 1990-12-23 | ||
| Imran Hussain | 1981-03-10 | ||
| Ole Moe (editor) | 1918-10-09 | ||
| Walt Tauscher | 1902-11-22 | ||
| Paul Meyers | 1895-11-19 | ||
| William Sidebottom (RAF officer) | 1893-10-11 | ||
| Tom Crosskey | 1905-07-04 | ||
| William Matthews (poet) | 1942-11-11 | ||
| John Brigg | 1834-09-21 | ||
| George Hawking | 1902-03-22 | ||
| Henry Avory | 1848-10-04 | ||
| Wolfgang Kaden | 1899-12-05 | ||
| Alison Jackson | 1970-05-15 | ||
| Howard Purcell | 1918-11-10 | ||
| Brian Nissen | 1927-10-20 | ||
| Johan O. Jarnæs | 1867-08-05 | ||
| Arthur René Jean Baptiste Bavay | 1840-04-29 | ||
| Eduardo Schaerer | 1873-12-02 | ||
| William Roupell | 1831-04-07 | ||
| Ramon Collazo | 1901-01-01 | ||
| Norman Schofield | 1944-01-30 | ||
| Miguel Olivera | 1946-07-05 | ||
| Eiichi Goto | 1931-01-26 | ||
| William T. Shorey | 1859-07-13 | ||
| Vernon L. Walker | 1894-05-02 | ||
| Jürgen Harder | 1918-06-13 | ||
| Fitz James O'Brien | 1828-12-31 | ||
| Wilhelm Fulda | 1909-05-21 | ||
| Henry Hannon | 1882-08-21 | ||
| Roy Proebstel | 1893-04-04 | ||
| Jørgen Meinich | 1820-03-24 | ||
| Charles Henville Bayly | 1807-03-13 | ||
| William A. S. Ouderland | 1917-12-06 | ||
| Bernie McCarthy | 1943-08-21 | ||
| Sir Thomas Gascoigne, 8th Baronet | 1745-03-07 | ||
| Amritlal Hargovinddas | 1889-08-29 | ||
| Fred Grabber | 1931-04-14 | ||
| Lewis Teague (painter) | 1917-11-30 | ||
| Jules Bouquet | 1888-11-30 | ||
| Stuart Spencer (political consultant) | 1927-02-20 | ||
| Alessandra Ammara | 1972-07-09 | ||
| Edward Francis Ryan | 1879-03-10 | ||
| Duygu Asena | 1946-04-19 | ||
| Charles Wyndham, 3rd Baron Leconfield | 1872-02-17 | ||
| Matteo Agosta | 1922-01-18 | ||
| Yoon Won-il (born 1986) | 1986-10-23 | ||
| Henrik Morén | 1887-01-05 | ||
| Roger Ferris | 1950-05-18 | ||
| László Muskát | 1903-01-26 | ||
| Ernest S. Brown | 1903-09-25 | ||
| Lothar Friedrich von Metternich-Burscheid | 1617-09-29 | ||
| Jim Cook | 1921-10-02 | ||
| Ellis Ryan | 1904-06-07 | ||
| Heinrich Kaup | 1912-07-25 | ||
| Paul Hamilton (footballer born 1941) | 1941-07-31 | ||
| Johann Gustav Fischer | 1819-03-01 | ||
| William Worthington (actor) | 1872-04-08 | ||
| William George Hoskins | 1908-05-22 | ||
| Alfred Cheeke | 1810-03-10 | ||
| Ernest Jacquet | 1886-09-25 | ||
| William W. "Bill" Kirtley | 1897-12-10 | ||
| Zepherinus Joseph | 1975-08-13 | ||
| Robert J. Horner | 1894-09-14 | ||
| Amin Sweeney | 1938-12-13 | ||
| William Cadogan, 7th Earl Cadogan | 1914-02-13 | ||
| Augusto H. Álvarez | 1914-12-24 | ||
| Arthur Cotton (politician) | 1913-01-23 | ||
| Herbert Studd | 1870-12-26 | ||
| John P. Kirk | 1867-09-20 | ||
| Deborah Scaling Kiley | 1958-01-21 | ||
| Justus Falckner | 1672-11-22 | ||
| William Penman | 1917-05-12 | ||
| William Milnor | 1769-06-26 | ||
| Luis Hierro Gambardella | 1915-09-01 | ||
| Andreas Loverdos | 1956-05-15 | ||
| Roy Evans (disambiguation) | 1913-11-10 | ||
| Joseph Przybylski | 1897-06-09 | ||
| William Connell (Australian politician) | 1891-01-21 | ||
| Hilary Bardwell | 1928-07-21 | ||
| Mike Bongiorno | 1924-05-26 | ||
| Sharon Slann | 1966-02-12 | ||
| James Bowen (railroad executive) | 1808-02-25 | ||
| William Gallant | 1915-01-20 | ||
| Samuel A. Schreiner, Jr. | 1921-06-06 | ||
| Margaret of Bavaria, Electress Palatine | 1456-11-07 | ||
| Nalini Ambady | 1959-03-20 | ||
| Tom Kelly (footballer, born 1919) | 1919-11-22 | ||
| Bill Bartley | 1885-01-08 | ||
| Henri Sévérin Béland | 1869-10-11 | ||
| Asuman Güzelce | 1969-04-01 | ||
| Renato Ardovino | 1968-11-29 | ||
| Irving Harper | 1916-07-14 |
Birth dates only on Wikidata
edit| Wikipedia article | Wikidata d.o.b. | Correct | Comment |
|---|---|---|---|
| Dumitru Dragomir | 1946-05-30 | D | Persondata not updated |
| Jack Kornfield | 1945-07-16 | D | Persondata only had year, not full date |
| Jesper Larsen | 1972-10-29 | D | Birth on dewiki, not on enwiki |
| Jeanne Demessieux | 1921-02-14 | D | Persondata only contained year |
| Rajiv Mehrotra | 1953-03-04 | P | Invalid date format in Persondata. Unreferenced and not mentioned in article. |
| Matthias de Visch | 1701-03-22 | D | Russian Wiki has full date, enwiki only has year |
| Mitch Fatel | 1975-12-20 | X | Persondata not synced with article. Wikidata also had incorrect year. |
| Norma Ray | 1970-03-21 | D | Persondata only had year |
| Gurbani Judge (VJ Bani) | 1987-11-29 | ? | Article birth date changes frequently! |
| Richard N. Gladstein | 1961-06-04 | D | Date only on dewiki |
| H. Edward Winter | 1908-10-14 | D | No date in Persondata |
| Martin Petrásek | 1966-03-26 | D | Date only in cswiki |
| Bobby Green (fighter) | 1986-09-09 | D | Only year in Persondata |
| Boyanka Kostova | 1993-05-10 | D | enwiki only wiki not to have date |
| Kemp Malone | 1889-03-14 | D | Date not added to Persondata |
| Corrado Pani | 1936-03-04 | D | Date not added to Persondata |
| Ilisavani Jegesa | 1988-11-22 | D | Date not added to Persondata |
| Edmond Genet | 1896-11-09 | D | Birth date only on svwiki |
| Pedro Julio Sánchez | 1940-04-08 | D | Birth data only on eswiki |
| Levko Lukyanenko | 1928-08-24 | D | Persondata not updated |
| Jocy de Oliveira | 1936-04-11 | ||
| Wu Yi | 1938-11-11 | ||
| Vittorio Ranuzzi de' Bianchi | 1857-07-14 | ||
| Earle C. Hayes | 1885-11-21 | ||
| Herwin Novianto | 1965-11-21 | ||
| Anthony J. DePace | 1892-07-13 | ||
| Patriarch Christopher II of Alexandria | 1876-01-17 | ||
| Georges Rousse | 1947-07-28 | ||
| Francis Boggs Snavely | 1897-04-19 | ||
| Judit Kormos | 1970-05-11 | ||
| François Coignet | 1814-02-11 | ||
| Gabriela Lena Frank | 1972-09-26 | ||
| James Stevenson-Hamilton | 1867-10-02 | ||
| Lev Oborin | 1907-08-28 | ||
| Tom Bethell | 1940-07-17 | ||
| Frederick Pang | 1936-11-16 | ||
| Rohit Gadia | 1984-08-27 | ||
| Jim Gervais | 1938-03-05 | ||
| Iris Stuart | 1903-02-02 | ||
| Gaetano Previati | 1852-08-31 | ||
| Khalid Shahdan | 1964-07-05 | ||
| James Strachey | 1887-09-26 | ||
| Jeff Bell | 1943-12-13 | ||
| Robert Ramillon | 1909-02-24 | ||
| Vladimir Rebikov | 1866-05-31 | ||
| Anna Fantastic | 1970-12-31 | ||
| Ignatije Midić | 1954-10-17 | ||
| Cecil Wood (cricketer) | 1875-11-21 | ||
| Julius Exner | 1825-11-30 | ||
| Thomas Satinsky | 1959-06-07 | ||
| Charles L. Kane | 1951-12-01 | ||
| Le Grand Kallé | 1930-12-16 | ||
| Henri Tézenas du Montcel | 1943-01-08 | ||
| Gustav Altenhain | 1891-12-05 | ||
| OdiakeS | 0000-03-22 | ||
| Faisal of Saudi Arabia | 1906-10-10 | ||
| Mark Lidzbarski | 1868-01-07 | ||
| John Ashley (bandit) | 1888-03-19 | ||
| Guennady Moisseev | 1948-02-03 | ||
| Adolf Gasser | 1903-11-25 | ||
| Víctor Cancino | 1972-06-27 | ||
| Walter Walford Johnson | 1904-04-16 | ||
| Werner Pusch | 1913-08-17 | ||
| Olivier Weber | 1958-06-12 | ||
| Sukhabodhananda | 1955-04-25 | ||
| Tolib Shakhidi | 1946-03-13 | ||
| Kazuhiko Nishi | 1956-02-10 | ||
| Ludwig Kasper | 1893-05-02 | ||
| Frederick Keeton | 1855-10-26 | ||
| Herman Hupfeld | 1894-02-01 | ||
| Charles Fleming (cricketer) | 1887-02-28 | ||
| Diego Estrada (athlete) | 1989-06-01 | ||
| Erich Haase | 1859-01-19 | ||
| Harri Rovanperä | 1966-04-08 | ||
| Lilyana Tomova | 1946-08-09 | ||
| Michael Rudman | 1939-02-14 | ||
| Armigel Wade | 1880-10-17 | ||
| Joe Meyers | 1871-12-05 | ||
| Sebastián Longo | 1983-05-27 | ||
| Flemming Delfs | 1951-09-07 | ||
| Kanchi Kaul | 1982-05-24 | ||
| Bobby Voelker | 1979-04-26 | ||
| Scott Taylor (journalist) | 1960-12-30 | ||
| Guido Herzfeld | 1851-08-14 | ||
| Lloyd Woodard | 1984-11-12 | ||
| Mati Karmin | 1959-02-26 | ||
| Mark Cameron | 1952-10-10 | ||
| Curt Thesing | 1879-04-21 | ||
| Dan Quinn (American football) | 1970-09-11 | ||
| Fiona McIntosh | 1960-03-14 | ||
| Ramadan Shalah | 1958-01-01 | ||
| James Whitley (alpine skier) | 1997-11-17 | ||
| Joseph Joffo | 1931-04-02 | ||
| Ivan Vandor | 1932-10-13 | ||
| Gregorio Cortez | 1875-06-22 | ||
| Mirjam Kristensen | 1978-05-17 | ||
| Wolfgang Fortner | 1907-10-12 | ||
| Ernest M. Skinner | 1866-01-15 | ||
| Hansjörg Wyss | 1935-09-19 | ||
| Bob Hale (philosopher) | 1945-05-04 | ||
| Pavel Fitin | 1907-12-28 | ||
| G. Ramachandran | 1931-05-23 | ||
| Adolf Zeising | 1810-09-24 | ||
| Saikumar (Malayalam actor) | 1963-04-14 | ||
| Ingo Kindervater | 1979-01-01 | ||
| Cassius Fairchild | 1829-12-16 | ||
| Gustav Blix | 1974-08-31 | ||
| Yuji Shiozaki | 1967-09-07 | ||
| Sam Houser | 1972-05-24 | ||
| Helene Tursten | 1954-02-17 | ||
| Erik Hartvall | 1875-02-18 | ||
| Loane | 1978-05-30 | ||
| Frenc Tal-Gharb | 1892-12-03 | ||
| Aureliano Bolognesi | 1930-11-15 | ||
| Francisco Rolão Preto | 1893-02-05 | ||
| Veli Lehtelä | 1935-09-06 | ||
| Adolfo Marsillach | 1928-01-25 | ||
| Joseph P. Foley | 1872-03-02 | ||
| Andrea Maffei | 1798-04-19 | ||
| Vladimir Litvinenko | 1955-08-14 | ||
| Mushegh Sarvarian | 1910-02-15 | ||
| Mircea Albulescu | 1934-10-04 | ||
| Carlo Airoldi | 1869-09-21 | ||
| Kenn (Japanese actor) | 1982-03-24 | ||
| Sneha Khanwalkar | 1983-04-28 | ||
| Andy Kim | 1946-12-05 | ||
| Dong Huling | 1992-11-29 | ||
| Sam Instone | 1977-08-03 | ||
| Malte Spitz | 1984-04-14 | ||
| Andrey Borovykh | 1921-10-30 | ||
| Mykola Katerynchuk | 1967-11-19 | ||
| Carl Grunert | 1865-11-02 | ||
| Brenda Miller Cooper | 1916-02-28 | ||
| Bruce Russett | 1935-01-26 | ||
| Tina Blau | 1845-11-15 | ||
| Isaak Sigal | 1927-03-31 | ||
| Angus MacDonald (politician) | 1963-10-11 | ||
| Ralph Nuzzo | 1954-02-23 | ||
| Bernhard Gál | 1971-11-19 | ||
| Andrei Knyazev (mathematician) | 1959-06-09 | ||
| Joseph Mayer (antiquary) | 1803-02-23 | ||
| Raymund Schwager | 1935-11-11 | ||
| Ruth Lomon | 1930-11-07 | ||
| Anthony John Cooke | 1931-01-29 | ||
| Devon Morris | 1961-01-22 | ||
| Chris D. | 1952-01-15 | ||
| William Falconer (translator) | 1801-12-27 | ||
| Hugo Reid | 1811-04-18 | ||
| Senkichi Awaya | 1893-11-07 | ||
| Leo Aloysius Pursley | 1902-03-12 | ||
| Fausto Torrefranca | 1883-02-01 | ||
| John Henry Anderson | 1814-07-14 | ||
| Chase Wright Vanek | 1996-06-27 | ||
| Adhemar Schwitzguébel | 1844-01-15 | ||
| Marshall James | 1970-10-04 | ||
| Augustinus Bludau | 1862-03-06 | ||
| Sandy Salmon | 1955-10-23 | ||
| J. Greg Peters | 1960-11-15 | ||
| Madeline Hartog-Bel | 1946-06-12 | ||
| Nikolay Kasatkin | 1859-12-25 | ||
| John McClung | 1935-07-15 | ||
| Carlos de Borja y Centellas | 1663-04-29 | ||
| Daýançgylyç Urazow | 1978-12-15 | ||
| Alma Kruger | 1871-09-13 | ||
| Jean-Pierre Sauvage | 1944-10-21 | ||
| Giuseppe Cominetti | 1882-10-28 | ||
| Eugene Herbert Clay | 1881-10-03 | ||
| Leendert Pieter de Neufville | 1729-03-08 | ||
| Yitzhak Gruenbaum | 1879-10-27 | ||
| Harry Söderman | 1902-08-28 | ||
| Takamura Kōun | 1852-03-08 | ||
| Eric Stokes (composer) | 1930-07-14 | ||
| Markus Toivonen | 1979-11-15 | ||
| Savva Mamontov | 1841-10-15 | ||
| Mara Venier | 1950-10-20 | ||
| Robert M. Nevin | 1850-05-05 | ||
| Abbé Pierre | 1912-08-05 | ||
| Stanisław Rogalski | 1904-05-25 | ||
| Todd Robert Petersen | 1969-08-17 | ||
| Jacques Toja | 1929-09-01 | ||
| Collingwood Ingram | 1880-10-28 | ||
| Heinrich Dorn | 1804-11-14 | ||
| David Hofstein | 1889-08-06 | ||
| Theodore Ushev | 1968-02-04 | ||
| Taylor Welch | 1989-11-01 |
Death dates only on Persondata
editDeath dates only on Wikidata
editConclusion
editMy main conclusion is that as far as birth/death date completeness and accuracy goes, there is no significant difference between Wikidata and Persondata. If you want to find a date, both offer a 90% chance of it being available and accurate. I personally have made the decision to switch to utilising Wikidata as I believe it has the potential to improve, whereas Persondata keeps being threatened!
Faults with the Wikidata database
editOn the assumption I will be working with Wikidata from this point on, I will list the problems that currently exist and that I hope to be helping to address.
- Wikipedia is the main source for Wikidata, but nothing seems to be in place to keep Wikidata synchronised
- There are Wikipedia articles with birth/death dates that have not yet been added to Wikidata
- There are Wikipedia articles with revised birth/death dates which are not being updated on Wikidata
- Articles that are deleted on Wikipedia (i.e. not-notable) leave behind an entry on Wikidata
- Wikipedia articles have problems that are not flagged. Wikidata picks up a date that is not necessarily correct
- Some Wikipedia articles have conflicting dates within the article
- Some Wikipedia articles have different dates between different language wikipedias
- Julian and Soviet calendars are not always been handled correctly
- Birth dates are rarely referenced on Wikipedia. This makes it impossible to correct any conflicting information. I raised this at WikiProject Biography but did not get much feedback.