I have created a mapping table [draft version] for accessibility metadata between Schema.org ( EPUB Accessibility 1.0 ), ONIX for Books 3.0, MARC21 and BIBFRAME (Bibliographic Framework Initiative).
In creating the mapping table, the following was referred to. But not all of them.
- Crosswalk | Accessibility Metadata Project
- MARC 21 to BIBFRAME 2.0 Conversion SpecificationsMARC 21 to BIBFRAME 2.0 Conversion Specifications
You can also see Japanese versions of this mapping table at another entry.