JSGF

JSGF is a language that describes a (spoken) language's grammar. It was written by Sun Microsystems.

#JSGF V1.0;
grammar nav_commands;
public <direction> = (up|down|left|right);    // one of up, down, left or right
public <number> = (one|two|three|four|five);
public <move> = <number> <direction>;        // combines direction and number into command

Documentation

official docs	https://www.w3.org/TR/jsgf
(tut) basics of jsgf	https://puneetk.com/basics-of-java-speech-grammar-format-jsgf

Libraries

python pyjsgf	designed to interpret/author JSGF
python pocketsphinx	includes Jsgf class, and FSG converter

Conversion

FSG

The sphinxbase project includes a commandline utility to convert jsgf to fsg.

sphinx_jsgf2fsg -fsg out.fsg < yourfile.jsgf