A11y metadata crosswalk from France (WIP)

Hello,
as discussed during the Accessibility task force meeting, attached to this
message is a translation of a document we are building in France to ensure
the best information about accessibility of publications is provided to
users. This work is a result of workshops and feedbacks based on the Display
guide <https://www.w3.org/2021/09/UX-Guide-metadata-1.0/principles/>. Hope
it will help reinforce the Crosswalk
<https://w3c.github.io/a11y-discov-vocab/crosswalk/>with MARC21 and
UNIMARC.
The document is organized by *Mentions* users want to find in the vendor or
library webpage, and for each mention there is a list composed of a note,
schema.org, ONIX, MARC21 and UNIMARC references. The note is often empty
and I think it will become a definition to clarify the meaning. I
added a *Table
view* at the end of the document that is an extract from the Crosswalk
<https://w3c.github.io/a11y-discov-vocab/crosswalk/>with two more columns
for MARC21 and UNIMARC to be  verified and completed.
Gautier Chomel for EDRLab.