Commons:Structured data/Modeling/Date

	Please help! – Work in progress
	You can help by working on guidelines and providing examples below. Visit the talk page to discuss this process in general.

How to model various types of times and dates in structured data, for files on Wikimedia Commons

Caution: distinction between a digital file, and a creative work shown/depicted in a file

When a file on Wikimedia Commons shows/depicts a creative work, date information about the file and about the depicted work are usually very different.

In some cases (when? criteria?) it is best to describe the creative work as an item on Wikidata to keep this distinction clear.

(example)

Modeling various dates and times related to Wikimedia Commons files

Type of metadata	Notes	Wikidata property	Status
Creation date	Too generic? What is exactly the creation date of a file?	inception (P571)	Specify further? Work in progress
Publication date	First time shared with a wider audience (affects copyright status)	publication date (P577)	Work in progress
Date depicted	Map or other representation of a specific date	date depicted (P2913)
Example	Example	Example	Work in progress

General notes and remarks

• Date properties should be direct, in order to be able to add qualifiers
  • earliest date (P1319), latest date (P1326), refine date (P4241)

Examples

(list files below that provide best practices on how to model various situations)

• 
  Example.jpg Example 1 of good data modelling of situation a
• 
  Example.jpg Example 2 of good data modelling of situation b