Created
June 2, 2017 21:27
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*BNF comparison
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| Undefined | |
| ref := component ["/" component]* | |
| component := alphanum [separator alphanum]* | |
| alphanum := /[A-Za-z0-9]+/ | |
| separator := /[-._:@+]/ | "--" | |
| ABNF | |
| ref = component *("/" component) | |
| component = alphanum *(separator alphanum) | |
| alphanum = 1*(ALPHA DIGIT) | |
| separator = "--" / "-" / "." / "_" / ":" / "@" / "+" | |
| PEG | |
| start <- component ("/" component)* | |
| component <- alphanum (separator alphanum)* | |
| alphanum <- (letter / digit)+ | |
| separator <- "--" / "-" / "." / "_" / ":" / "@" / "+" | |
| letter <- [A-Za-z] | |
| digit <- [0-9] | |
| XML 1.0 EBNF | |
| ref ::= component ("/" component)* | |
| component ::= alphanum (separator alphanum)* | |
| alphanum ::= [a-zA-Z0-9]+ | |
| separator ::= [-._:@+] | "--" |
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