Property talk:P1931

Documentation

• Start a query
• Current uses
• Statistics by class
• String length
• List of qualifiers
• Count

NIOSH Pocket Guide ID
Identifier for a chemical in the NIOSH Pocket Guide to Chemical Hazards

Applicable "stated in" value	NIOSH pocket guide to chemical hazards, 2005 edition, 3rd printing (Q20022913)
Data type	String
Domain	chemical substance (Q79529) (note: this should be moved to the property statements)
Allowed values	According to this template: 4-digit identifier According to statements in the property: \d{4} When possible, data should only be stored as statements
Example	acetone (Q49546) → 0004 cyclopentane (Q80260) → 0171 lithium hydride (Q79583) → 0371
Source	http://www.cdc.gov/niosh/npg
Formatter URL	http://www.cdc.gov/niosh/npg/npgd$1.html
Tracking: usage	Category:Pages using Wikidata property P1931 (Q47455004)
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 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/P1931 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 777 distinct values ratio Main statement 715 92% of uses 673 1.1 Qualifier 3 0.4% of uses Reference 59 7.6% of uses
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

Format “\d{4}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P1931#Format, hourly updated report, SPARQL

Single value: this property generally contains a single value. (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/P1931#Single value, SPARQL

Scope is as main value (Q54828448), as reference (Q54828450): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P1931#Scope, hourly updated report, SPARQL

This property is being used by: de:Vorlage:PGCH Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Convert datatype from string to external-id

@DannyS712, Epìdosis, Wostr:

•  Support conversion to external-id and apply move per MediaWiki_talk:Wikibase-SortedProperties/Archive_1#Chemistry_IDs MrProperLawAndOrder (talk) 15:39, 5 June 2020 (UTC)
•  Support, agree. --Epìdosis 17:21, 5 June 2020 (UTC)
•  Question is there any reason why it wasn't created as an external-id datatype or why it wasn't modified earlier (Wikidata:Identifier migration/1)? Wostr (talk) 06:01, 6 June 2020 (UTC)
  • No unique value, I think. I just added the constraint (as deprecated) and it shows still many violations. --- Jura 04:56, 9 June 2020 (UTC)
    • There isn't exactly a 1:1 mapping. Some Pocket Guide entries are for broad classes of chemicals and accordingly there can be a 1:many relationship between a Pocket Guide entry and the set of chemicals covered. But the property is still an external identifier, is it not? Harej (talk) 02:44, 28 August 2020 (UTC)