+ | Const of NReference.reference (* ref has (indtype|constr)no *)
+ | Sort of sort (* sort *)
+ | Implicit of implicit_annotation (* ... *)
+ | Match of NReference.reference * (* ind. reference, *)
+ term * term * (* outtype, ind. term *)
+ term list (* patterns *)
+
+
+(********************************* TYPING ***********************************)
+
+type context_entry = (* A declaration or definition *)
+ | Decl of term (* type *)
+ | Def of term * term (* body, type *)
+
+type hypothesis = string * context_entry (* name, entry *)
+
+type context = hypothesis list
+
+type conjecture = string option * context * term
+
+type metasenv = (int * conjecture) list
+
+type subst_entry = string option * context * term * term (* name,ctx,bo,ty *)
+
+type substitution = (int * subst_entry) list
+
+
+(******************************** OBJECTS **********************************)
+
+type relevance = bool list (* relevance of arguments for conversion *)
+
+ (* relevance, name, recno, ty, bo *)
+type inductiveFun = relevance * string * int * term * term
+ (* if coinductive, the int has no meaning and must be set to -1 *)
+
+type constructor = relevance * string * term (* id, type *)
+
+type inductiveType =
+ relevance * string * term * constructor list
+ (* relevance, typename, arity, constructors *)
+
+type def_flavour = (* presentational *)
+ [ `Definition | `Fact | `Lemma | `Theorem | `Corollary | `Example ]
+
+type def_pragma = (* pragmatic of the object *)
+ [ `Coercion of int
+ | `Elim of sort (* elimination principle; universe is not relevant *)
+ | `Projection (* record projection *)
+ | `InversionPrinciple (* inversion principle *)
+ | `Variant
+ | `Local
+ | `Regular ] (* Local = hidden technicality *)
+
+type ind_pragma = (* pragmatic of the object *)
+ [ `Record of (string * bool * int) list | `Regular ]
+ (* inductive type that encodes a record; the arguments are the record
+ * fields names and if they are coercions and then the coercion arity *)