| Below of term * term
| Above of term * term
| Frac of term * term
+ | Over of term * term
| Atop of term * term
-(* | Array of term * literal option * literal option
+(* | array of term * literal option * literal option
|+ column separator, row separator +| *)
| Sqrt of term
| Root of term * term (* argument, index *)
| ArgPattern of argument_pattern
| ApplPattern of cic_appl_pattern list
+type value =
+ | TermValue of term
+ | StringValue of string
+ | NumValue of string
+ | OptValue of value option
+ | ListValue of value list
+
+type value_type =
+ | TermType
+ | StringType
+ | NumType
+ | OptType of value_type
+ | ListType of value_type
+
+type declaration = string * value_type
+