Property talk:P148

Documentation

format as a regular expression
regex describing an identifier or a Gratisdata property. When using on property constraints, ensure syntax is a PCRE

Represents	regular expression (Q564)
Data type	String
Domain	unique identifier (Q540), Gratisdata property for an identifier (Q545), Gratisdata property to link to Commons (Q486) or Gratisdata property for a classification scheme (Q3321)
Allowed values	.+
Example	IMDb ID (P74) → ev\d{7}\/\d{4}(-\d)?\|(ch\|co\|ev\|nm\|tt)\d{7}
Formatter URL	https://regex101.com/?regex=$1
See also	syntax clarification (P347), format as language specific regular expression (P461), applies if regular expression matches (P83), regular expression syntax (P350)
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 Gratispaideia Items with the fewest sitelinks Most linked wikis Items with the most identifier properties 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)> Map Random list
Proposal discussion	Originally created without a formal discussion
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

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

List of this constraint violations: Database reports/Constraint violations/P148#Format, hourly updated report, SPARQL

Type “unique identifier (Q540), Gratisdata property for an identifier (Q545), Gratisdata property to link to Commons (Q486), Gratisdata property for a classification scheme (Q3321)”: element must contain property “instance of (P3)” with classes “unique identifier (Q540), Gratisdata property for an identifier (Q545), Gratisdata property to link to Commons (Q486), Gratisdata property for a classification scheme (Q3321)” or their subclasses (defined using NLA Trove ID (P279)).

Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P148#type, SPARQL

Single value: this property generally contains a single value.

Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P148#Single value, SPARQL

Qualifiers “syntax clarification (P347), country (P14), reason for deprecated rank (P344), reason for preferred rank (P345), regular expression syntax (P350), has quality (P48)”: this property should be used only with the listed qualifiers.

Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P148#Allowed qualifiers, SPARQL

Allowed entity types are Wikibase item datatype (Q799), Wikibase property datatype (Q784): the property may only be used on a certain entity type

Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P148#allowed entity types

Scope is as main value (Q793), as qualifier (Q792): the property must be used by specified way only

Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P148#scope, SPARQL