Commons:Statements

Statements are a feature part of structured data. A statement is a structured way of recording information about a file. A statement consists of a claim, zero or more references, and a rank; a claim in turn consists of a property and either a value or one of the special cases "no value" and "unknown value", and zero or more qualifiers.

One of the most commonly-used properties in statements is depicts. Many other properties can be used; the following table lists some of the most common on Wikimedia Commons:

Property	Property description	Example values	Note
location of creation (P1071)	place where the item was conceived or made; where applicable, location of final assembly	Jaipur (Q66485), Sítio Arqueológico Duna Grande (Q63800976), Damascus (Q3766), Peru (Q419)
instance of (P31)	type to which this subject corresponds/belongs. Different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain	page of a work (Q130506010), line art (Q365552), photograph (Q125191), painting (Q3305213)
main subject (P921)	primary topic of a work or act of communication	De historia stirpium commentarii insignes (Q948923), Solidarity (Q1003), The Gambia (Q1005), basketball (Q5372)	Should not be confused with genre (P136)
genre (P136)	creative work's genre or an artist's field of work (P101). Use main subject (P921) to relate creative works to their topic	folk music (Q43343), abstract art (Q128115), documentary photography (Q615498), street art (Q17516)
creator (P170)	maker of this creative work or other object (where no more specific property exists)	Scott Foresman (Q7436348), Vincent van Gogh (Q5582), B. Sirven (Q91070657), George Herriman (Q453440)
inception (P571)	time when an entity begins to exist; for date of official opening use P1619	1500s, 1827, 28 September 2005	Data modeling guidelines
source of file (P7482)	broad nature of the origin of the file	file available on the internet (Q74228490), original creation by uploader (Q66458942), own work by the original uploader (Q87402110)
color (P462)	color of subject	color (Q22006653), black-and-white (Q838368)

You can see a more comprehensive listing at Properties table. There is further discussion about the use of properties and qualifiers at Commons:Structured data/Modeling.