Format as a Regular Expression

:((?:(?:[^?+*{}()[\]\\|]+|\\.|\[(?:\^?\\.|\^[^\\]|[^\\^])(?:[^\]\\]+|\\.)*\]|\((?:\?[:=!]|\?<[=!]|\?>)?(?1)??\)|\(\?(?:R|[+-]?\d+)\))(?:(?:[?+*]|\{\d+(?:,\d*)?\})[?+]?)?|\|)*)

Allowed Qualifiers Constraint

Property

:

:

:

Reason for Preferred Rank

Property

:

Reason for Deprecated Rank

Property

:

Regular Expression Syntax

Property

:

Syntax Clarification

Property

:

Constraint Clarification

Format Constraint

Format as a Regular Expression

:.+

Constraint Status

:

Mandatory Constraint

Allowed-Entity-Types Constraint

Item of Property Constraint

:

Wikibase Item

Item of Property Constraint

:

Wikibase Property

Subject Type Constraint

Class

:

Wikidata Property with Datatype String that Is Not an External Identifier

Class

:

Wikidata Property for an Identifier

Class

:

Wikidata Property to Link to Commons

Class

:

Identifier

Relation

:

Instance or Subclass Of

Property Scope Constraint

:

:

Format as a Regular Expression

:(?!.*A-z).+

Constraint Clarification

: [A-z] will match some punctuation characters as well. Use [A-Za-z] instead if this should match uppercase and lowercase a to z.

Format Constraint

Format as a Regular Expression

:(?!.*\\/).+

Constraint Clarification

: Forward slashes should not be escaped.

Described at URL

https://www.pcre.org/current/doc/html/

Regular Expression Syntax

Syntax Clarification

Format as a Regular Expression

Regex

Format as a Regular Expression

Regex

Statements about Format as a Regular Expression

Instance Of

Icon

Property Constraint

Described at URL

Statements about Format as a Regular Expression

Instance Of

Icon

Property Constraint

Described at URL