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certificationRating

A Schema.org Property

This term is in the "new" area - implementation feedback and adoption from applications and websites can help improve our definitions.
Rating of a certification instance (as defined by an independent certification body). Typically this rating can be used to rate the level to which the requirements of the certification instance are fulfilled. See also gs1:certificationValue.

Values expected to be one of these types

Used on these types

Source

https://github.com/schemaorg/schemaorg/issues/3230