syntax diagram generator -- collected / originated from sqlite developers!
Tcl
Latest commit 3f2b2bd Feb 9, 2012 @jsyang init commit
Permalink
Failed to load latest commit information.
README init commit Feb 9, 2012
bubble-generator-data.tcl init commit Feb 9, 2012
bubble-generator.tcl init commit Feb 9, 2012

README

Railroad syntax diagram generator
Feb. 9, 2012
NOT authored by jsyang.ca@gmail.com, originally found at the following places:

http://wiki.tcl.tk/21708
http://stackoverflow.com/questions/773371/what-is-a-good-tool-for-creating-railroad-diagrams/773453#773453
http://www.sqlite.org/docsrc/artifact/46e904a66f

For example syntax see http://www.sqlite.org/docsrc/artifact/46e904a66f
Create "bubble-generator-data.tcl" in the same path as this script, and run:
OSX$ wish bubble-generator.tcl