File Extension SML File Format Simile model file SML stands for Simile model file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Synon/2E - No member source genned DBMS: What's the difference betwen logical and conceptual model? What is the difference between logical data modelling, conceptual data modelling and physical data modelling?