When there are multiple VIAF clusters for the same entity (personal name or otherwise) and when they are noted in an affected NAR for registration with the LC/NACO Authority File, those multiple VIAF clusters often become consolidated.

e.g.,

(1)  As of February 15, 2018, there were 2 VIAF clusters for the same corporate body with no involvement of any name change:

670  DNb in VIAF, Feb. 15, 2018 ǂb (access point: Aoki Gallery (Tokio))
670  JTNDL in VIAF, Feb. 15, 2018 ǂb (access point: 青木画廊 = Aoki Garō; ...)

At that time, both of these 2 VIAF clusters were noted in the NAR registered with the LC/NACO Authority File:

0247 198557377 ǂ2 viaf
0247 http://viaf.org/viaf/198557377 ǂ2 uri
0247 258166849 ǂ2 viaf
0247 http://viaf.org/viaf/258166849 ǂ2 uri

Then, some 10 days later, on February 26, 2018, the latter VIAF cluster, VIAF ID 258166849, was merged into the former VIAF cluster, VIAF ID 198557377.

(2)  As of April 19, 2018, there were 2 VIAF clusters for the same author with no involvement of multiple identity:

670  JTNDL in VIAF, Apr. 19, 2018 ǂb (access point: 黒須, 高嶺 = Kurosu, Takane; r; b. 1980)
670  KR-SlNLK in VIAF, Apr. 19, 2018 ǂb (access point: 구로스 다카네 1980- = Kurosŭ Tak'ane 1980- ...)

At that time, both of these 2 VIAF clusters were noted in the NAR registered with the LC/NACO Authority File:

0247 251897550 ǂ2 viaf
0247 http://viaf.org/viaf/251897550 ǂ2 uri
0247 306144928080354341932 ǂ2 viaf
0247 http://viaf.org/viaf/306144928080354341932 ǂ2 uri

Then, 10 days later, on April 29, 2018, the latter VIAF cluster, VIAF ID 306144928080354341932, was merged into the former VIAF cluster, VIAF ID 251897550.

(3)  As of April 9, 2018, there were 2 VIAF clusters for the same corporate body with no involvement of any name change:

670  DNb in VIAF, Apr. 9, 2018 ǂb (access point: SGCIME; ...)
670  JTNDL in VIAF, Apr. 9, 2018 ǂb (access point: マルクス経済学の現代的課題研究会 = Marukusu Keizaigaku no Gendaiteki Kadai Kenkyūkai; ...)

At that time, both of these 2 VIAF clusters were noted in the NAR registered with the LC/NACO Authority File:

0247 258525917 ǂ2 viaf
0247 http://viaf.org/viaf/258525917 ǂ2 uri
0247 4911151051826333530003 ǂ2 viaf
0247 http://viaf.org/viaf/4911151051826333530003 ǂ2 uri

Then, 6 days later, on April 15, 2018, the latter VIAF cluster, VIAF ID 4911151051826333530003, was merged into the former VIAF cluster, VIAF ID 258525917.

et cetera

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On Tue, May 8, 2018 at 4:59 PM, Kathie Coblentz <[log in to unmask]> wrote:
If a library in VIAF makes its own authority records accessible through VIAF (like BnF, DNB and a few others) I tend to cite those directly, rather than use the form "So-and-so in VIAF." The two most usual cases when I would cite VIAF "straight" are:

1) When there is great discrepancy in the forms used, as for instance, VIAF ID: 47830304, where two widely different death dates are given for the same person, 1499? and 1521. (The German National Library date "1521" is wrong, and I have contacted one of the sources they cite with an explanation of how the error occurred; a correction is promised.)

2) When there are multiple clusters in VIAF for the same person. In this case I list the various VIAF ID numbers as if they were pages in a print reference work, and give the various forms for each number in parentheses. VIAF ID: 47830304 is also an example of this; it is one of three different clusters in VIAF for Henricus/Heinrich/Henri Mayer, an early printer of German origin, active in Toulouse. There doesn't seem to be a good channel to provide feedback to VIAF about this sort of thing, so I just note it in my record.

By the way, if you're citing the various forms used by different libraries in VIAF, there is an easy way to collect all the data: Select and copy the data in the list at the top of the record, little flags and all. Either copy and paste it line by line into your 670 field, or copy it all and paste it into a text file, or a word processing file using the "text only" option. All the little flags will miraculously turn into library names; you'll only have to get them all in one line and adjust the punctuation. Thus (straight from my clipboard to this message):

Mayer, Henri ‎  ISNI
Mayer, Henricus, -1499? ‎  Library of Congress/NACO
Mayer, Henricus (14..-1521). ‎  NUKAT Center of Warsaw University Library
Mayer, Heinrich -1521 ‎  German National Library

(This is with my setup, using the Chrome browser. Your results may vary.)

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Kathie Coblentz | The New York Public Library
Rare Materials Cataloger
Special Collections/Special Formats Processing
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476 5th Avenue, Room 313, New York, NY 10018
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My opinions, not NYPL's