The M4 macro system

Bravura Security Fabric uses an off-the-shelf text macro system called M4 to construct the Legacy skin files. m4 expands short strings (macros) into longer strings.

An M4 macro processor is shipped with Bravura Security Fabric.m4 was made popular on Unix systems as a way to manage sendmail configuration files more easily. For more information about M4, visit: http://www.gnu.org/software/m4/.

An M4 file may consist of: