fo-check for oXygen is giving me some errors with the following situations:
...
3) <fo:block-container column-gap="9.75mm"
axf:line-number-width="4.75mm" axf:line-number-font-family="Arial"
axf:line-number-font-weight="normal" axf:line-number-reset="force" >
From Antenna House USA support issue: