Tool for generating railroad diagram used on json.org [closed]

Answer 1

There was a similar question a few days ago: What is a good tool for creating railroad diagrams?

That question was about how railroad diagrams in the SQLite syntax diagrams were generated. The accepted answer found that the diagrams were generated using a DSL written in Tcl.

Another answer offered a suggestion to use a diagram generator which works off of EBNL grammar.

Answer 2

One of the things that IBM's railroad track generator handles well is default values. I have not seen another generator that does this.

An example is

          ┌─────◀────┐┌(──«defaults»─)─┐                        
▶▶─COMMAND┴«argument»┴┼────────────────┼──────────────────────▶◀
                      │ ┌────◀─────┐   │                        
                      └(┴┬«option»┬┴┬─┬┘                        
                         └Help────┘ └)┘                         

Answer 3

I found J-algo tool. I think it is very easy to draw diagram but I can't export to image or another type.

http://j-algo.binaervarianz.de/index.php

Answer 4

Tab Atkins Jr. created a Javascript Railroad-diagram Generator using svg specifically because he could not find one that had the visual appeal he wanted , i.e. "the JSON.org look".

Answer 5

There is an Online Railroad Diagram Generator. It creates SVG syntax diagrams, also known as railroad diagrams, from context-free grammars specified in EBNF. You can copy the SVG code or take screen shots.

You have to type in the grammar and it'll make the diagram.

For example, to create the first railroad diagram you show, you would use the code:

object ::= '{' ((string ':' value ) ( ',' string ':' value )*)? '}'

Then you could go on to define string and value using string ::= ... and value ::= ... The references are all shown.

Check out some of the example diagrams on the page. They have XML and even EBNF itself.

Answer 6

Take a look at http://code.google.com/p/html-railroad-diagram/ which generates HTML railroad diagrams. There is an example that shows the JSON railroad generated in an HTML page by JavaScript with links.