E:TaggedEventStruct. tag(E) 
|E|
LabelA:Type, B:(AType), p:(a:A
B(a)). 2of(p) B(1of(p))A:Type, B:(AType), p:(a:AB(a)). 1of(p) A| Who Cites event tag? | |
| event_tag | Def tag(E) == 1of(2of(2of(2of(2of(2of(E)))))) |
| Thm* E:TaggedEventStruct. tag(E) |E|Label | |
| pi2 | Def 2of(t) == t.2 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p) B(1of(p)) | |
| pi1 | Def 1of(t) == t.1 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p) A |
| Syntax: | tag(E) | has structure: | event_tag(E) |
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