| `Obj of string * position * pi_depth option
]
+let sort_tbl = "refSort"
+let rel_tbl = "refRel"
+let obj_tbl = "refObj"
+let owners_tbl = "owners"
+let conclno_tbl = "no_inconcl_aux"
+let conclno_hyp_tbl = "no_concl_hyp"
+let name_tbl = "objectName"
+