Property talk:P3285

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Mathematics Subject Classification ID
identifier of the same topic in the Mathematics Subject Classification

Applicable "stated in" value	Mathematics Subject Classification (Q967960)
Data type	External identifier
Domain	maths and physics topics - theories, fields of study, ... (note: this should be moved to the property statements)
Allowed values	\d\d(-(XX|\d\d)|[A-Z](xx|\d\d))
Example	quantum chaos (Q1502341) → 81Q50 (RDF) artificial intelligence (Q11660) → 68Txx (RDF)
Source	https://msc2020.org
Formatter URL	https://zbmath.org/classification/?q=cc:$1
See also	Mathematical Reviews ID (P889), zbMATH Open document ID (P894)
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/P3285 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 393 Main statement 390 99.2% of uses Qualifier 3 0.8% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Format “\d\d(-(XX|\d\d)|[A-Z](xx|\d\d))”: 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/P3285#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/P3285#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/P3285#Scope, SPARQL

math

ch 49.145.111.49 16:25, 14 July 2022 (UTC)

MSC2020 is out, should it replace this version?

See MSC2020.org. Note the CSV download. Would these be an appropriate entry in Wikipedia's Authority Control template? RDBrown (talk) 23:41, 14 June 2023 (UTC)

 Done Physikerwelt (talk) 14:28, 16 June 2023 (UTC)