typedef int PK_facet_ignore_t;
This field can take any one of the following values.
PK_facet_ignore_no_c : no features ignored
PK_facet_ignore_absolute_c : input an absolute value
PK_facet_ignore_ratio_c : input the ratio of feature to model box
PK_facet_ignore_body_ratio_c: input the ratio of feature to body box