Schema certifiedBy + certifierCredential to ONIX correspondance

[LaZay]

In the 2. Schema.org and ONIX section, the Schema values certifiedBy + certifierCredential can be mapped to ONIX.
From code list 196
Code 93 = Compliance certification by
URL of a web page belonging to the organisation responsible for compliance testing and certification of the product – typically a ‘home page’ or a page describing the certification scheme itself.

Nota: remember that anybody qualified can certify the conformance: the publisher, a trusted intermediary (subconstractor), or an independant organism. This is why the customer must know who certified. In order to measure the level of trust of the certification.
This is also why ONIX requires complementary information on the certification+certifier.