Property talk:P2888

Documentation

• Start a query
• Current uses
• Statistics by class
• Network protocols
• List of qualifiers
• Count

exact match
URL used to link two items or properties, indicating a high degree of confidence that the concepts can be used interchangeably

Represents	exact match (Q39893449)
Data type	URL
Allowed values	https?://.+^(?!https?://schema\.gov\.it/lodview/controlled-vocabulary/).*
Example	asthma (Q35869) → http://purl.obolibrary.org/obo/DOID_2841 Africa (Q15) → https://cv.iptc.org/newscodes/worldregion/r002 Barack Obama (Q76) → https://data.nobelprize.org/resource/laureate/845
Tracking: usage	Category:Pages using Wikidata property P2888 (Q61035470)
See also	equivalent class (P1709), narrower external class (P3950), catalog code (P528), broader concept (P4900), official website (P856), equivalent property (P1628), said to be the same as (P460)
Lists	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) Database reports/Constraint violations/P2888 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 519,876 Main statement 519,832 >99.9% of uses Qualifier 17 <0.1% of uses Reference 27 <0.1% 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).
List of violations of this constraint: Database reports/Constraint violations/P2888#Unique value, SPARQL (every item), SPARQL (by value)

Format “https?://.+”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P2888#Format, hourly updated report, SPARQL

Scope is as main value (Q54828448): 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/P2888#Scope, SPARQL

Qualifiers “media type (P1163), language of work or name (P407), content deliverer (P3274), end time (P582), reason for deprecated rank (P2241), archive URL (P1065), section, verse, paragraph, or clause (P958), file format (P2701), last update (P5017)”: this property should be used only with the listed qualifiers. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: The First Backrooms (Q114860490)
List of violations of this constraint: Database reports/Constraint violations/P2888#allowed qualifiers, SPARQL

Allowed entity types are Wikibase property (Q29934218), Wikibase item (Q29934200), Wikibase lexeme (Q51885771), Wikibase form (Q54285143), Wikibase sense (Q54285715): 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/P2888#Entity types

Format “^(?!https?://schema\.gov\.it/lodview/controlled-vocabulary/).*”: 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/P2888#Format, SPARQL

This property is being used by: hy:Կաղապար:Տեղեկաքարտ Ֆերմենտ Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Proposal: Change Wikidata item of this property (P1629)exact match (Q39893449) to Wikidata item of this property (P1629)sameAs (Q54819698)

exact match (Q39893449) is Simple Knowledge Organization System (Q2288360) specific whereas sameAs (Q54819698) is generic. This property is not Simple Knowledge Organization System (Q2288360) specific however so it should be linked to the more generic item.

WikiProject Ontology has more than 50 participants and couldn't be pinged. Please post on the WikiProject's talk page instead. WikiProject Properties has more than 50 participants and couldn't be pinged. Please post on the WikiProject's talk page instead.

Iwan.Aucamp (talk) 06:43, 30 June 2020 (UTC)

Discussion

•  Comment support or object here ... I would say separately also that the label for exact match (Q39893449) should be clearer to avoid this. I will change it later I guess. Iwan.Aucamp (talk) 06:42, 30 June 2020 (UTC)

Overlap with described at URL (P973) and individual properties

Please see Wikidata:Project_chat#Interpreting_"described_at_URL"_(P973). --- Jura 09:58, 19 February 2021 (UTC)

Replace usage if property exists?

If Bob Smith has exact match of example.com/people/1122333, and there is a property "Example.com Person ID" that maps to example.com/people/{{ID}}, should usage of "exact match" be replaced with "Example.com Person ID"? Can all such usages be found automatically? Can all such usages be replaced automatically? Bogger (talk) 14:28, 7 December 2021 (UTC)

"exact match" to EU Vocabulary URL on language items is nonsensical

The EU is a political body and the language classification scheme is an external and often inaccurate attempt to describe languages. This information should either be included with a corresponding property in the identifiers section for an item or not at all. --Middle river exports (talk) 04:22, 11 May 2022 (UTC)

Make label/description more clearly about RDF?

This property is supposed to be for RDF URIs, but people often misuse it to link to web pages about the same topic. That's not surprising, because neither the English label nor English description even mention RDF.

Perhaps "RDF URI for exact match" would be a better label?

- Nikki (talk) 11:15, 6 July 2024 (UTC)