pageBreakMarkers vs pageNavigation mapping from ONIX

[HadrienGardeur]

In the current draft of the Schema.org Accessibility Properties Crosswalk, code 19 from list 196 in ONIX ("Print-equivalent page numbering") is currently mapped to pageBreakMarkers rather than pageNavigation.

Looking at the note on https://ns.editeur.org/onix/en/196/19 about this code, it's not obvious whether this is the right mapping:

For a reflowable e-publication, contains references to the page numbering of an equivalent printed product. Use with relation code 13 to specify an identifier for the source of the page numbers

Since printPageNumbers is now considered deprecated, I think we need to be super careful about this mapping and if the previous use of printPageNumbers truly meant pageBreakMarkers instead of pageNavigation.