Note: you are viewing the development version of schema.org. See How we work for more details.

firstAppearance

This term is proposed for full integration into Schema.org, pending implementation feedback and adoption from applications and websites.

Thing > Property > workExample > firstAppearance

Indicates the first known occurence of a Claim in some CreativeWork.
Values expected to be one of these types
CreativeWork
Used on these types
Claim
Super-properties
workExample

Source

https://github.com/schemaorg/schemaorg/issues/1828