Property talk:P1184

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Handle ID
Handle System identifier, which is a superset of the DOI

Description	Handle System (Q3126718) identifier, which is a superset of the DOI (P356)
Represents	Handle System (Q3126718)
Data type	External identifier
Template parameter	Template:Hdl (Q11717292) (commons:Template:Handle with 20,000+ uses, w:en:Template:Hdl with 1200 uses, and other languages with <20 uses); and Template:Cite hdl (Q7624305). 640 raw links on de.wp and 330 raw links on fr.wp
Domain	creative work (note: this should be moved to the property statements)
Allowed values	[0-9a-z]+(\.[0-9a-z]+)*\/.{2,}
Example	Eleanor Elizabeth Bourne Papers (Q15664389) → 10462/eadarc/7154 Dialogue avec l'histoire : les collections de la Bibliothèque de l'Université Laval (Q63615887) → 20.500.11794/34239 Navigating and Responding to Raciolinguistic Ideologies: Refugee and Immigrant Students' Literacy Practices Across Contexts (Q104248274) → 1773/45982
Source	Handle System (note: this information should be moved to a property statement; use property source website for the property (P1896))
Formatter URL	https://hdl.handle.net/$1
See also	DOI (P356)
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 Usage history (total) Usage history (main statement) Chart by item creation date Database reports/Constraint violations/P1184 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 135,041 Main statement 124,911 92.5% of uses Qualifier 18 <0.1% of uses Reference 10,112 7.5% of uses
Search for values

[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). Known exceptions: The World Factbook 1981 (Q114040024), The World Factbook 1982 (Q19102705), The World Factbook Nineteen Hundred and Eighty-Three (Q114041401), The World Factbook Nineteen Hundred and Eighty-Four (Q114041518), The World Factbook Nineteen Hundred and Eighty-Five (Q114042618), The World Factbook Nineteen Hundred and Eighty-Six (Q114042616), The World Factbook 1987 (Q114067732), The World Factbook 1988 (Q114067763)
List of violations of this constraint: Database reports/Constraint violations/P1184#Unique value, SPARQL (every item), SPARQL (by value)

Format “[0-9a-z]+(\.[0-9a-z]+)*\/.{2,}”: value must be formatted using this pattern (PCRE syntax). (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/P1184#Format, 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/P1184#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/P1184#Scope, SPARQL

This property is being used by: en:Template:Hdl, en:Template:Cite Q sr:Шаблон:Hdl ja:Template:Hdl, ja:Template:Cite Q pa:ਫਰਮਾ:Hdl ilo:Plantilia:Cite Q hi:साँचा:सन्दर्भ विकिडाटा sl:Predloga:Navedi Q nn:Mal:Kjelde på Wikidata cy:Nodyn:Cite Q d:Template:Cite Q da:Skabelon:Cite Q v:en:Template:Cite Q ko:틀:Hdl sco:Template:Hdl id:Templat:Hdl it:Template:Hdl tr:Şablon:Q kaynağı bn:টেমপ্লেট:এইচডিএল tum:Template:Hdl Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Purpose

Handles are used for digital objects, especially by photographs by GLAMs and research papers held in academic digital repositories. The example provided is a Wikisource transcribed digital object provided by a GLAM. I can also provide an example of a notable research paper with a handle if required, but that will take a bit more searching. John Vandenberg (talk) 18:02, 28 January 2014 (UTC)

Single value constraint?

Hi!

Because of the work that I'm doing with my sock puppet account (Iván Hernández Cazorla) I have doubts about the single value constraint in Handle ID (P1184). Why "single value constraint"? A publication may have more than one Handle System ID because it may be in more than one repository that uses Handle Systems. For example, El concepto de Epigrafía. Consideraciones sobre la necesidad de su ampliación, cincuenta años después (Q52155710) has two handle IDs: one for accedaCRIS (Q52155934) and another for the Biblioteca Digital Universidad de Alcalá. Two different handles for the same publication. There are probably more cases besides this.

What do you think about it? Should the "single value constraint" be removed of this property? At least I think it would be the correct, but maybe you know something that I don't know.

Regards, Ivanhercaz (Talk) 16:14, 25 April 2018 (UTC)

Another case that I just added: Las revistas científicas canarias de Humanidades: del papel a la edición electrónica (Q52230778). Ivanhercaz (Talk) 16:03, 27 April 2018 (UTC)

We also have the single value constrain violations list for this property, where there is 269 violations. Regards, Ivanhercaz (Talk) 12:26, 28 April 2018 (UTC)

I agree that this constraint is likely to be violated often. The Handle ID is a unique identifier for a particular digital copy of a work, but our items are about works, not particular copies. -− Pintoch (talk) 12:40, 28 April 2018 (UTC)

Hi Pintoch! Of course, for what you said the distinct-values constraint (Q21502410) has sense, because is one Handle ID for a copy. So, in theory, Wikidata shouldn't have two items with the same identifier. But many times the works are in different repositories, these copies sometimes have different Handle ID: the same works, but in different locations and with different identifiers. I don't know if there is a rule to add one Handle ID and not other, I think there isn't and it could be complicated. In my mind the most reasonably is to add all Handle ID availables. For that I think the "single value constraint" isn't suitable for this property. Regards, Ivanhercaz (Talk) 13:19, 28 April 2018 (UTC)

Yes, I have therefore deleted the constraint. − Pintoch (talk) 13:22, 28 April 2018 (UTC)

Thank you, Pintoch! Regards, Ivanhercaz (Talk) 13:26, 28 April 2018 (UTC)

identifier shared with

I've added this as an allowed qualifier here, and on Google Books ID (P675). Though these "should" have unique values, there are unfortunately (many) cases where different publications have been bound together, in different combinations, by different libraries. A fairly odd example is the CIA World Factbook (look at https://catalog.hathitrust.org/Record/000532922).... the University of California decided to bind them differently. Even though cases where "identifier shared with" still violate the distinct-value constraint, this qualifier lets us mark cases where the value being used on more than one item is actually appropriate. Jarnsax (talk) 05:39, 19 September 2022 (UTC)