Property talk:P9566

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diel cycle
pattern of diel activity in animals, such as "nocturnal" (Q101029366), "diurnal" (Q4284186)

Represents	diel cycle (Q1469559)
Data type	Item
Domain	taxon (Q16521)
Allowed values	nocturnal (Q101029366), diurnality (Q4284186), crepuscular (Q3255068), cathemeral (Q5052479), matutinal (Q6792025) or vespertine (Q4118084)
Example	According to this template: Canis mesomelas (Q45108723) → crepuscular (Q3255068) [1] Western European Hedgehog (Q6145) → nocturnal (Q101029366) [2] South American Coati (Q148462) → diurnality (Q4284186) [3] According to statements in the property: black-backed jackal (Q188944) → crepuscular (Q3255068) Western European Hedgehog (Q6145) → nocturnal (Q101029366) South American Coati (Q148462) → diurnality (Q4284186) When possible, data should only be stored as statements
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 By value of property Most statements Fewest statements Most sitelinks Most linked wikis Total of sitelinks on items Most identifiers Fewest identifiers 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/P9566 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 284,676 Main statement 284,672 >99.9% of uses Qualifier 4 <0.1% of uses
Search for values

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

One of nocturnal (Q101029366), diurnality (Q4284186), crepuscular (Q3255068), cathemeral (Q5052479), matutinal (Q6792025), vespertine (Q4118084): value must be one of the specified items. Please expand list if needed. (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/P9566#One of, values statistics, search, SPARQL

Type “taxon (Q16521)”: item must contain property “instance of (P31)” with classes “taxon (Q16521)” or their subclasses (defined using subclass of (P279)). (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/P9566#Type Q16521, 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/P9566#Entity types

Scope is as main value (Q54828448): 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/P9566#Scope, SPARQL

Citation needed: the property must have at least one reference (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/P9566#citation needed

Queries

Gallery of nocturnal animals

• Items used: nocturnal (Q101029366)   

• Properties used: diel cycle (P9566)   , image (P18)   

• Features used: ImageGrid (Q24515278)   

#defaultView:ImageGrid
SELECT DISTINCT ?item ?itemLabel ?itemDescription (SAMPLE(?img) as ?image)
{
  ?item wdt:P9566 wd:Q101029366 .
  OPTIONAL { ?item wdt:P18 ?img }  
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}
GROUP BY ?item ?itemLabel ?itemDescription
LIMIT 100

Try it!

Discussion

Different cycles in different circumstances

Consider the source Golden hamsters are nocturnal in captivity but diurnal in nature (Q24657316)

@Lmalena, Arbnos, UWashPrincipalCataloger, Jura1: You participated in the proposal. Do you have ideas for how to qualify this? What seems correct?

• Syrian hamster (Q204175) → nocturnal (Q101029366)
  • valid in period (P1264) → captivity (Q28100974)
• Syrian hamster (Q204175) → diurnality (Q4284186)
  • lifestyle (P1576) → wildlife (Q241741)

Blue Rasberry (talk) 20:29, 15 May 2021 (UTC)

• Syrian hamster (Q204175) → diurnality (Q4284186)
  • excluding (P1011) → captivity (Q2920296) UWashPrincipalCataloger (talk) 01:21, 16 May 2021 (UTC)

• If the values are just wildlife and captivity, maybe criterion used (P1013).

Isn't lifestyle (P1576) mostly for humans?

"excluding (P1011) → captivity (Q2920296)" seems to work this way round, but I would be less convinced by "excluding (P1011) → wildlife (Q241741)" --- Jura 07:01, 16 May 2021 (UTC)

I think valid in period (P1264) is more accurate, there are also animals that shift their cycle if they live close to urban environments or not, or at winter/summer --Lmalena (talk) 13:53, 16 May 2021 (UTC)