.RNG File Extension
File Type 1Nokia Composer Ringtone
What is an RNG file?
Monophonic ringtone format used by Nokia cell phones; can be created using the Nokia Composer program included with certain Nokia phones; because it is a monophonic format, only one note can be played at a time
File Type 2RELAX NG File
.RNG File Association 2
File used for validating .XML documents; uses a simple schema language for XML that focuses on the description and validation of the structure and content of an XML document.