A Tabular View of Marpa::R2's DSL

					Allowed adverbs per rule
Rule	Min [1]	Max [1]	Pseudo	Sample	action	assoc	bless	event	latm	name [2]	null-ranking [3]	pause	priority	proper	rank [4]	separator
Default	0	N	√	:default ::= action => [values]	√		√
Discard	0	N	√	:discard ~ whitespace				√
Discard Default	0	1		discard default = event => :symbol = on				√
Empty [5]	0	N		lhs ::=	√		√
Inaccessible symbol	0	N		inaccessible is ok by default
Lexeme	1	N	√	:quote ~ ["]				√				√	√
Lexeme Default	0	1		lexeme default = action => [start, length, value]	√	√			√
Named event	0	N		event 'a' = completed A
Prioritized [5]	0	N		expression ::= number \| '(' expression ')'	√	√	√
Quantified [5]	0	N		script ::= expression+	√		√							√		√
Start [6]	0	1	√	:start ::= graph_grammar
Rule	Min [1]	Max [1]	Pseudo	Sample	action	assoc	bless	event	latm	name [2]	null-ranking [3]	pause	priority	proper	rank [4]	separator
					Allowed adverbs per rule

Notes
[1]: Min/max is the minimum/maximum number of times the statement can appear in the grammar
[2]: The name adverb applies only to rules and rule alternatives. When specified, it defines a name for that rule alternative
[3]: The null-ranking adverb applies only to G1 rules (L0 rules do not have a semantics) and is ignored unless the SLIF recognizer's ranking_method named argument is set to something other than its default
[4]: rank is ignored unless the recognizer's ranking_method named argument is set to something other than its default
[5]: There must be at least 1 of these G1 rules in the grammar
[6]: The Start rule, if not explicitly listed, is assumed to be the 1st G1 rule in the grammar. Clearly, it will be one of those marked [5], i.e. Empty, Prioritized or Quantified