Framemaker and DITA compliance

It's been awhile 
since I used Framemaker - but as I recall it used to use non-standard 
configuration files, but loosely related to standard DTDs, and require 
read/write rules to output standard XML.

 

Is this still the 
case? 

 

If it is, the it's 
got me wondering: in what sense can they claim compliance with either our 
document or our DTD module specifications?

 

--Dana