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PM20 geo code
code for a geographical category in the 20th Century Press Archives' "countries" category system
In more languages
Data type
External identifier
Statements
instance of
Wikidata property for authority control for places
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Wikidata property related to archives
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issued by
20th Century Press Archives
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applicable 'stated in' value
20th Century Press Archives
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Wikidata property example
Europe
PM20 geo code
A1
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Hamburg
PM20 geo code
A9
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Japan
PM20 geo code
B111
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German East Africa
PM20 geo code
C110
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Antarctic
PM20 geo code
F11
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formatter URL
https://pm20.zbw.eu/category/geo/s/$1
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source website for the property
https://pm20.zbw.eu
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expected completeness
eventually complete
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stability of property value
values can be added
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property proposal discussion
https://www.wikidata.org/wiki/Wikidata:Property_proposal/PM20_geo_code
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Constraints
property constraint
format constraint
format as a regular expression
[A-GJ]\d+[a-z]?(\(\d+\))?|H
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distinct-values constraint
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single-value constraint
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allowed-entity-types constraint
item of property constraint
Wikibase item
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property scope constraint
property scope
as main value
as qualifier
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