Property talk:P6721

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K10plus PPN ID
identifier in the K10plus union catalog of the Common Library Network (GBV) and the South-West German Library Network (SWB)

Applicable "stated in" value	K10plus (Q100884768)
Data type	External identifier
Allowed values	\d{8,9}[0-9X]
Example	Die türkische Bibel, oder der Koran (Q1219621) → 140733168X (RDF) Hamlet, Prince of Denmark (Q14422206) → 1080118047 (RDF) El Señor Presidente (critical edition) (Q15220486) → 322891337 (RDF)
Source	https://kxp.k10plus.de/DB=2.1/ http://swb.bsz-bw.de/DB=2.1/
Formatter URL	https://opac.k10plus.de/DB=2.299/PPNSET?PPN=$1 https://kxp.k10plus.de/DB=2.1/PPNSET?PPN=$1
Related to country	Germany (Q183) (See 362 others)
See also	DNB edition ID (P1292), swisscovery edition ID (P9907), Library of Congress Control Number (LCCN) (bibliographic) (P1144), OBV edition ID (P6201), SWB editions (P1044)
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/P6721 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 13,801 Main statement 13,005 out of 76,700,000 (0% complete) 94.2% of uses Qualifier 4 <0.1% of uses Reference 792 5.7% of uses
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Format “\d{8,9}[0-9X]”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P6721#Format, hourly updated report, SPARQL

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/P6721#Item P31, hourly updated report, search, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (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/P6721#Entity types

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/P6721#Scope, SPARQL

Conflicts with “instance of (P31): literary work (Q7725634)”: 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/P6721#Conflicts with P31, search, SPARQL

Label required in languages: de: Entities using this property should have labels in one of the following languages: de (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/P6721#Label in 'de' language, search, SPARQL

Pattern ^PPN(\d+X?)$ will be automatically replaced to \1. Testing: TODO list