Property talk:P1871

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CERL Thesaurus ID
identifier in the Consortium of European Research Libraries Thesaurus

Applicable "stated in" value	CERL Thesaurus (Q60909659)
Has quality	prefix (Q23585486)
Data type	External identifier
Domain	human (Q5), imaginary character (Q115537581), corporation (Q167037), geographic location (Q2221906), family (Q8436), personification (Q207174), individual (Q795052), group of living things (Q16334298), group of fictional characters (Q14514600), group of mythical characters (Q20830276) or company (Q783794)
Allowed values	c(af|nc|ni|nl|np)0\d{7}
Example	Simone da Lesina (Q18945790) → cnp00166993 (RDF) Diego Velázquez (Q297) → cnp00396778 (RDF) Charles Baudelaire (Q501) → cnp01430730 (RDF)
Source	https://thesaurus.cerl.org
Formatter URL	https://data.cerl.org/thesaurus/$1
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 Map of people by place values: place of birth educated at work location residence place of death place of burial January 1st dates People with date of birth on January 1 People with date of death on January 1 People with both dates on January 1 Mix'n'match (Report) Database reports/Constraint violations/P1871 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 328,309 Main statement 288,755 88% of uses Qualifier 3 <0.1% of uses Reference 39,551 12% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Format “c(af|nc|ni|nl|np)0\d{7}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P1871#Format, hourly updated report, SPARQL

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/P1871#Unique value, SPARQL (every item), SPARQL (by value)

Type “human (Q5), imaginary character (Q115537581), corporation (Q167037), geographic location (Q2221906), family (Q8436), personification (Q207174), individual (Q795052), group of living things (Q16334298), group of fictional characters (Q14514600), group of mythical characters (Q20830276), company (Q783794)”: item must contain property “instance of (P31)” with classes “human (Q5), imaginary character (Q115537581), corporation (Q167037), geographic location (Q2221906), family (Q8436), personification (Q207174), individual (Q795052), group of living things (Q16334298), group of fictional characters (Q14514600), group of mythical characters (Q20830276), company (Q783794)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: Sillery (Q3483898)
List of violations of this constraint: Database reports/Constraint violations/P1871#Type Q5, Q115537581, Q167037, Q2221906, Q8436, Q207174, Q795052, Q16334298, Q14514600, Q20830276, Q783794, 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/P1871#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/P1871#Scope, SPARQL

This property is being used by: it:Template:Controllo di autorità s:sl:Predloga:Avtor Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

About 3000 additions

FYI [1] --Federico Leva (BEIC) (talk) 11:10, 3 May 2016 (UTC)

I see Magnus had already added over 10 thousands on January 7, thanks Magnus![2] Federico Leva (BEIC) (talk) 11:22, 3 May 2016 (UTC)

Single value? no

The claim is made above that most CERL IDs will have a single value, but that doesn't seem to be the case from what I've seen. There appear to be at least six identifiers for Aeschylus (Q40939) alone, and possibly more. Do the maintainers of their database do no merging of duplicate items? --EncycloPetey (talk) 14:56, 3 May 2016 (UTC)

They certainly do, but like every other database there are errors. VIAF has many duplicates, too. I guess the "single value" property is aspirational, as in many other properties. Federico Leva (BEIC) (talk) 15:00, 3 May 2016 (UTC)

I ask because I know that VIAF has consolidated many duplicates. Where they had more than one, those have since been combined. The GND has also had some duplicates, but I have seen them correcting these issues as they are found. Is the CERL database doing the same thing, or should we expect the many duplicates to remain without correction? --EncycloPetey (talk) 18:03, 3 May 2016 (UTC)

I already answered this question above. If you ask numbers about how many items are consolidated over time, I don't have any (nor we have numbers about VIAF, AFAIK). Federico Leva (BEIC) (talk) 13:56, 6 May 2016 (UTC)

VIAF monitors Wikidata when we flag duplicates. --RAN (talk) 02:29, 17 November 2019 (UTC)

Errors

I am correcting errors in Wikidata of people who died before they were born and people who lived over 120 years that are not recognized supercenturians. Many errors are coming from this database. Is there a mechanism to correct the errors? The best I can do on the Wikidata end is to deprecate the error and give "reason for deprecation" as implausibility. Someone at VIAF reviews errors we flag here and makes corrections, we need the same for CERL. --RAN (talk) 02:28, 17 November 2019 (UTC)

CERL has actually just started the process of reviewing errors and resolving conflicts with Wikidata. For now I think they focused on disambiguation and the main results of that can be seen at Special:Contributions/Lenlivent. Nemo 18:39, 17 November 2019 (UTC)

Database will be migrated to a newer version

Note on the home page ("Aktualisierung"):

• Am 11. April wird diese Datenbank auf eine neuere Version migriert. Bitte beachten Sie, dass es ab dem 10. April, 12:00 Uhr (GMT) nicht mehr möglich sein wird, Datensätze zu bearbeiten.
• Die Datenbank wird am 11. April den ganzen Tag heruntergefahren. Sie steht voraussichtlich ab dem 12. April wieder zur Verfügung.

--Kolja21 (talk) Kolja21 (talk) 22:10, 6 April 2023 (UTC)