The DQPARSESCORDEPTH
function sets the level of how deeply to search for the best parsing
score. LEVEL must be in the range from five to ten inclusive, or zero.
If at least one of the conditions is true, DQPARSESCORDEPTH overrides
the default scoring depth value. If zero is returned, there is no
override value in force.
The DQPARSESCORDEPTH
function returns the previous value of the override solutions depth.