Information Mediator - Metadata HTTP Headers

Hi, first of all congratulations for publishing the Information Mediator specification.
I’m reading it at the moment and enjoying the content.

Just one question in regards to the HTTP Headers naming convention “X-GovStack-*”. I was wondering the rationale for not adopting an existing standard for the metadata. For example, the CNCF CloudEvents specification which is extensible and covers multiple protocols: GitHub - cloudevents/spec: CloudEvents Specification

Regards,
Fabio.