Property talk:P4095

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Principal Galaxies Catalogue ID
identifier for an astronomical object in the Principal Galaxies Catalogue

Applicable "stated in" value	Principal Galaxies Catalogue (Q1479861)
Data type	External identifier
Template parameter	currently used in |names= in en:Template:Infobox galaxy (example: en:Messier 84); could be made a distinct parameter there
Domain	According to this template: astronomical objects According to statements in the property: astronomical object (Q6999) When possible, data should only be stored as statements
Allowed values	\d+
Example	Messier 84 (Q92258118) → 40455 NGC 151 (Q183617) → 2035 NGC 166 (Q258274) → 2143
Source	over 8,000 values already in Wikidata (note: this information should be moved to a property statement; use property source website for the property (P1896))
Formatter URL	https://ned.ipac.caltech.edu/cgi-bin/objsearch?extend=yes&objname=PGC+$1
Tracking: usage	Category:Pages using Wikidata property P4095 (Q55769654)
See also	Uppsala General Catalogue ID (P6340)
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/P4095 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 17,331 Main statement 17,327 >99.9% of uses Qualifier 3 <0.1% of uses Reference 1 <0.1% of uses
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Format “\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/P4095#Format, SPARQL

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/P4095#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/P4095#Unique value, SPARQL (every item), SPARQL (by value)

Type “astronomical object (Q6999)”: item must contain property “instance of (P31)” with classes “astronomical object (Q6999)” or their subclasses (defined using subclass of (P279)). (Help)

List of violations of this constraint: Database reports/Constraint violations/P4095#Type Q6999, hourly updated report, SPARQL

Item “catalog code (P528)”: Items with this property should also have “catalog code (P528)”. (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/P4095#Item P528, search, SPARQL

Conflicts with “subclass of (P279)”: this property must not be used with the listed properties and values. (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/P4095#Conflicts with P279, search, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

List of violations of this constraint: Database reports/Constraint violations/P4095#Entity types, hourly updated report

Item “instance of (P31)”: Items with this property should also have “instance of (P31)”. (Help)

List of violations of this constraint: Database reports/Constraint violations/P4095#Item P31, hourly updated report, search, 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/P4095#Scope, SPARQL