Property talk:P302

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RERO ID
identifier in the Library network of Western Switzerland's RERO database
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constraint “type constraint (Q620)” declaration error: “required qualifier “relation (P238)” is missing”.
Format “0(1-R|2-A)\d{9}: 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/P302#Format, SPARQL