I'm translating the ABNF grammar defined in RFC 5322 to ANTLR4. This is practice to touch-up my ANTLR knowledge. My trouble is with two rules, define ...

In RFC 3986, they defined the rule: For simplicity, let's assume pchar is defined: What does path-empty match and how is it matched? I've read ...

The following set of antlr grammar lines gives me the error for number_operation & number_argument as given below The following sets of rules ...

Is there a BNF type grammer description of the Purescript language? It is hard to get a good handle on the language when the syntax is buried and sca ...

could you please tell me if the following syntax is compatible with rfc3261? Thanks. 401 Unauthorized: or should be I'm trying to analyze using ...

Context Solving a CORS issue, I was wondering what are the valid values for the HTTP response header Access-Control-Allow-Headers. The Whatwg CORS s ...

The IETF RFC 822 has these BNF rules: I'd like to know what the ampersand symbol & signifies in these rules. The ampersand symbol is not define ...

I'm trying to parse an HTTP header field according the ABNF rule header-field specified in the relevant section of RFC 7230. These rules are: (obs- ...

I have the following ABNF grammar: I would expect this to match the strings 0 and 00, but it only seems to match 00? Why? repl-it demo: https://re ...

Say for instance I had a data set that was self describing. The first few well-structured records define data type IDs, which include the name and len ...

I am currently debugging an ABNF grammar. It is currently very big. I am finding it difficult to debug. An IDE or syntax highlighter would be very hel ...

Does the order of rules in Augmented Backus-Naur Form matter? In particular, are and the same? What about and ? Would it be possible to ...

Is the alternative operator (/) in Augmented Backus-Naur Form commutative? For example, is s = a / b the same as s = b / a? ...

The RFC 2282 for emails have the below ABNF for quoted-string. I googled and foundthat CFWS is Comments, Folding, Whitespaces. I know what whitespa ...

Is it acceptable for the QVALUE to be "1." or "0." in, say, the Accept-Language header? e.g. Accept-Language: en;q=1. or Accept: text/plain;q=0. RFC7 ...

I recently read an RFC document and I noticed that regex operators that have been used don't match the commonly known. For example: The square brac ...

I want to write a grammar for a file format whose content can contain characters other than US-ASCII ones. Since I am used to ABNF, I try to use it... ...

I have a file which contains a ABNF Grammar with tags like in this simplified example: Now the task is to obtain the userID by parsing a given sent ...

Thanks for the inputs for question posted at link Parse::ABNF perl usage . I am still facing difficulty in resolving my problem. Request to check my p ...

I need to transform undermentioned ABNF rules (mlaer) to REGEX Is any tool or sth to do it automatically? ...