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14
15 include "basic_2/grammar/term.ma".
16
17 (* LOCAL ENVIRONMENTS *******************************************************)
18
19 (* local environments *)
20 inductive lenv: Type[0] ≝
21 | LAtom: lenv                       (* empty *)
22 | LPair: lenv → bind2 → term → lenv (* binary binding construction *)
23 .
24
25 interpretation "sort (local environment)"
26    'Star = LAtom.
27
28 interpretation "environment construction (binary)"
29    'DxItem2 L I T = (LPair L I T).
30
31 interpretation "environment binding construction (binary)"
32    'DxBind2 L I T = (LPair L I T).
33
34 interpretation "abbreviation (local environment)"
35    'DxAbbr L T = (LPair L Abbr T).
36
37 interpretation "abstraction (local environment)"
38    'DxAbst L T = (LPair L Abst T).
39
40 (* Basic_1: removed theorems 2: chead_ctail c_tail_ind *)