What is .MML file extension?
File created using the Adobe Maker Markup Language (MML); used by Adobe FrameMaker, a program used to produce and publish large structured documents; contains formatting instructions for page layout, graphics, text, and other page properties.
MML files may be imported into an existing FrameMaker document, or they may be used to generate a new page layout. They are stored in an ASCII text format.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.