struct PK_TOPOL_fctab_facet_face_s
       {
       int   *face;
       int   length;
       };
typedef struct PK_TOPOL_fctab_facet_face_s
               PK_TOPOL_fctab_facet_face_t;


This is a support structure for PK_TOPOL_facet_r_t. It represents a
one column table which maps facet indices into face entity values
(i.e. it defines which facet is derived from which PK face entity).