Property talk:P920

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LEM ID
subject headings for public libraries maintained by the Spanish Ministry of Education, Culture and Sport

Description	Subject Headings for public libraries mantained by the Spanish Ministry of Education, Culture and Sport (Q3181296). Terms are linked to other authority control entities like LCSH, GND, RAMEAU, or LEMAC.
Associated item	Ministry of Education, Culture and Sport (Q3181296)
Applicable "stated in" value	LEMb (Q58845575)
Data type	External identifier
Domain	term (note: this should be moved to the property statements)
Allowed values	LEM\d{9}
Example	philosophy (Q5891) → LEM201010931 (RDF) photomicrography (Q130416) → LEM201003988 (RDF)
Source	http://id.sgcb.mcu.es/
Formatter URL	http://id.sgcb.mcu.es/Autoridades/$1/concept.html
Related to country	Spain (Q29) (See 146 others)
See also	National Library of Spain ID (P950)
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 Mix'n'match (Report) Database reports/Constraint violations/P920 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 680 Main statement 676 out of 19,152 (4% complete) 99.4% of uses Qualifier 2 0.3% of uses Reference 2 0.3% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

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/P920#Single value, 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/P920#Unique value, SPARQL (every item), SPARQL (by value)

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

List of violations of this constraint: Database reports/Constraint violations/P920#Format, hourly updated report, SPARQL

Conflicts with “instance of (P31): Wikimedia disambiguation page (Q4167410), Wikimedia category (Q4167836)”: this property must not be used with the listed properties and values. (Help)

List of violations of this constraint: Database reports/Constraint violations/P920#Conflicts with P31, hourly updated report, SPARQL

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/P920#Scope, 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/P920#Entity types

Unused and broken formatter url

Is this likely to be of any use?
--- Jura 16:09, 2 June 2016 (UTC)

I've just updated the formatter URL to the new one. IMHO is useful, equivalent to other subject headings like Library of Congress authority ID (P244). —surueña 07:40, 18 August 2016 (UTC)

30 uses in the last 4 years... --Gerwoman (talk) 10:57, 3 July 2020 (UTC)

New formatter URL

P920's subject subheadings scheme has a different format than the one described in P1793 i.e. SH's are LEM\d{9}: http://id.sgcb.mcu.es/Autoridades/LEM201010931/concept.html

but sub - SH's are LEMAC\d{9}: http://lemac.sgcb.mcu.es/Autoridades/LEMAC201229620/concept.html

How can we change the Regex in P920 's P1793 to LEM(?:AC)?\d{9} so that both are accepted?

cc @Gerwoman: @Jura1: @Suruena:

Silva Selva (talk) 23:55, 29 November 2020 (UTC)

datatype change

Please note Silva Selva's proposal at Wikidata:Contact_the_development_team#Change_P920_property’s_data_type_from_“string”_to_“external_identifier”. --- Jura 12:15, 3 December 2020 (UTC)

Type was changed 2020-12-17 [1], since then it sorts in the section external IDs, but before at least most of them, e.g. before VIAF https://web.archive.org/web/20240125103711/https://www.wikidata.org/wiki/Q1845#identifiers CV213 (talk) 14:34, 25 January 2024 (UTC)

User:Epìdosis can you help? CV213 (talk) 14:36, 25 January 2024 (UTC)

No, I can't; only the developers (which can be contacted at WD:DEV) can change the datatype of a property. --Epìdosis 15:11, 25 January 2024 (UTC)

Only WD:DEV can change sorting? CV213 (talk) 15:33, 25 January 2024 (UTC)

After some search I found MediaWiki:Wikibase-SortedProperties CV213 (talk) 15:55, 25 January 2024 (UTC)