rng-conditional-up-to-date-start

rng-conditional-up-to-date-start is a variable defined in `rng-valid.el'.
Its value is

nil

• Automatically becomes buffer-local when set.

Documentation:
Marker for the start of the conditionally up-to-date region.
It is nil if there is no conditionally up-to-date region. The
conditionally up-to-date region must be such that for any cached
state S with position P in the conditionally up-to-date region,
if at some point it is determined that S becomes correct for P,
then all states with position >= P in the conditionally up to
date region must also then be correct and all errors between P
and the end of the region must then be correctly marked.