1 files changed, 59 insertions, 0 deletions
diff --git a/spec/syntax.zbnf b/spec/syntax.zbnf
new file mode 100644
index 0000000..b87efb5
--- /dev/null
+++ b/spec/syntax.zbnf
@@ -0,0 +1,59 @@
+Unit          : Blank* [ Datum [Blank] ]
+
+
+Blank         : 9...13 | SP | Comment
+
+Datum         : OneDatum ( [JoinChar] OneDatum )*
+
+JoinChar      : '.' | ':'
+
+
+Comment       : ';' ( SkipUnit | SkipLine )
+
+SkipUnit      : '~' Unit
+
+SkipLine      : ( ~LF )* [LF]
+
+
+OneDatum      : BareString | CladDatum
+
+
+BareString    : ( '.' | '+' | '-' | DIGIT ) ( BareChar | '.' )*
+              | BareChar+
+
+CladDatum     : PipeStr | QuoteStr | HashExpr | QuoteExpr | List
+
+PipeStr       : '|' ( PipeStrChar | '\' StringEsc )* '|'
+QuoteStr      : '"' ( QuotStrChar | '\' StringEsc )* '"'
+HashExpr      : '#' ( RuneExpr | LabelExpr | HashDatum )
+QuoteExpr     : "'" Datum | '`' Datum | ',' Datum
+List          : ParenList | SquareList | BraceList
+
+BareChar      : ALPHA | DIGIT
+              | '!' | '$' | '%' | '*' | '+'
+              | '-' | '/' | '<' | '=' | '>'
+              | '?' | '@' | '^' | '_' | '~'
+
+PipeStrChar   : ~( '|' | '\' )
+QuotStrChar   : ~( '"' | '\' )
+
+StringEsc     : '\' | '|' | '"' | ( HTAB | SP )* LF ( HTAB | SP )*
+              | 'a' | 'b' | 't' | 'n' | 'v' | 'f' | 'r' | 'e'
+              | 'x' HexByte+ ';'
+              | 'u' UnicodeSV ';'
+
+HexByte       : HEXDIG HEXDIG
+UnicodeSV     : HEXDIG+
+
+RuneExpr      : Rune [ '\' BareString | CladDatum ]
+LabelExpr     : '%' Label ( '%' | '=' Datum )
+HashDatum     : '\' BareString | CladDatum
+
+Rune          : ALPHA ( ALPHA | DIGIT )*
+Label         : HEXDIG+
+
+ParenList     : '(' ListBody ')'
+SquareList    : '[' ListBody ']'
+BraceList     : '{' ListBody '}'
+
+ListBody      : Unit* [ Blank* '&' Unit ] Blank*