Property talk:P384

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Universal Decimal Classification
type of library classification
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Format “((\=|\-|\`|\(|\(\=|\*|\+|\:{1,2}|\")?\d{1,3}(\.\d{1,3})*(\)|\")?)+: value must be formatted using this pattern (PCRE syntax).
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P384#Format, SPARQL
Allowed entity types are Wikibase item datatype (Q799): 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/P384#allowed entity types