The
<term>
non-deterministic parsing choices
</term>
of the
<term>
main parser
</term>
for a
<term>
language L
</term>
are directed by a guide which uses the shared
<term>
derivation forest
</term>
output by a prior
<term>
RCL parser
</term>
for a suitable
<term>
superset
</term>
of L .
#1701The non-deterministic parsing choices of the main parser for a language L are directed by a guide which uses the shared derivation forest output by a prior RCL parser for a suitable superset of L .