In scrum guide, it is said : " Significant aspects of the process must be visible to those responsible for the outcome.
Transparency requires those aspects be defined by a common standard so observers share a common understanding of what is being seen.
For example:
A common language referring to the process must be shared by all participants;"
why authors used process and not framework. Scrum is defined as a framework.
And does the word aspect refers to roles, events, artifacts and rules.