Property talk:P1048

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NCL ID
identifier for authority control issued by the National Central Library in Taiwan

Description	authority control number of the National Central Library (Q618340) (NCL)
Represents	National Central Library (Q618340)
Associated item	National Central Library (Q618340)
Has quality	numeric identifier (Q93868746)
Data type	External identifier
Template parameter	zh:Template:Authority control: NCL (+ NCL_URL)
Domain	persons (note: this should be moved to the property statements)
Allowed values	\d{9}
Usage notes	To obtain the authoritative control identification code of the National Library of Taiwan, please copy the string of numbers following "acc_sequence=" in the URL (Note: This is not the page's system number).
Example	Wu Cheng'en (Q228889) → 002186701 Luo Guanzhong (Q264517) → 002184969 Albert Einstein (Q937) → 000714104 Zhang Qun (Q702934) → 001991261
Source	https://aleweb.ncl.edu.tw/F?func=scan-list
Formatter URL	https://aleweb.ncl.edu.tw/F/?func=accref&acc_sequence=$1
Tracking: usage	Category:Pages using Wikidata property P1048 (Q98131251)
Related to country	Taiwan (Q865) (See 51 others)
See also	CYT/CCS (P10307), LDT @ Library Name Authority ID (P10489)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other external identifier Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Items with deprecated claims Usage history (total) Usage history (main statement) Chart by item creation date Database reports/Constraint violations/P1048 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 2,487 Main statement 2,458 98.8% of uses Qualifier 4 0.2% of uses Reference 25 1% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Distinct values: this property likely contains a value that is different from all other items. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1048#Unique value, SPARQL (every item), SPARQL (by value)

Single value: this property generally contains a single value. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1048#Single value, SPARQL

Format “\d{9}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P1048#Format, hourly updated report, SPARQL

Conflicts with “instance of (P31): Wikimedia disambiguation page (Q4167410), Wikimedia list article (Q13406463)”: this property must not be used with the listed properties and values. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1048#Conflicts with P31, search, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1048#Entity types

Scope is as main value (Q54828448), as reference (Q54828450): the property must be used by specified way only (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1048#Scope, SPARQL

This property is being used by:

• ar:قالب:ضبط استنادي
• ko:틀:위키데이터 속성 추적
• wikt:ko:틀:위키데이터 속성 추적
• incubator:Template:Wp/jje/위키데이터 속성 추적
• en:Template:Wikidata property tracking

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Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

catld#

How does the ID for linked data get appended with this? For instance, 蕭軍, http://catld.ncl.edu.tw/authority/AC000000200. Thank you.

jshieh (talk) 18:55, 15 November 2019 (UTC)

Please use CYT/CCS (P10307), NCL ID (P1048) is not the CYT component of Virtual International Authority File (Q54919). Kethyga (talk) 12:53, 31 January 2022 (UTC)

Change of NCL IDs

Moved from User talk:Sd5605

Hi Sd5605, the NCL IDs seems to have changed. Do you know more about it? And wouldn't it be better to move the IDs instead of deleting them? NCL 000623250 (added in 2013) now "Hergenhan, Laurie" = Laurie Hergenhan (Q6501606): Australian literary critic? --Kolja21 (talk) 02:25, 3 November 2025 (UTC)

I assume the acc_sequence parameter was changed once between 2014 and 2015, but has remained stable since 2015, as Wu Cheng'en (Q228889) is not 000190369 described in your proposal, but in most cases it's a different issue that followed.

The old Template:Authority control (Q3907614) has two parameters, NCL and NCL_URL (Special:Diff/115338081). The NCL is the "系統號" displayed on the web page to identify an authority file internally, while the NCL_URL is the acc_sequence parameter in the URL address, which is a kind of identifier used by Aleph (Q294385) for heading strings, such as the "權威標目" (Authorized Heading) or "不用款目" (See From Tracing), rather than for an authority file.

After the approval of NCL ID (P1048), I believe its definition soon drifted to NCL_URL rather than NCL in the early years (179252538, 206013468, 246886373) in order to take advantage of the feature of formatter URL (P1630), and the definition has already been explicitly clarified in the zh and zh-hant descriptions of NCL ID (P1048) (1142425663, 1604848445). However, probably because both are 9-digit identifiers, many manual contributors have been mistaken for years.

I'm going to inspect all of the current ~2k statements soon, and I do not prefer moving these statements to other items, as they resulted from a misinterpretation and sometimes include malfunctioning references, such as those made by 197.133.65.21. Sd5605 (talk) 03:29, 3 November 2025 (UTC)