RMP - RealPlayer Metadata Package File holds the playlist of the storage space, real player. This is an application with storage using the XLM formatting. This system sets up categories whereby music is listed. Song titles and their authors are easier to find and share with others. New music is readily downloaded into this file. RMP - RealPlayer Metadata Package File allows you to send a playlist to anyone without the hassle of searching through hundreds of songs. Pull a playlist up by genre or album. RMP - RealPlayer Metadata Package File is a popular multimedia application, and holds a large library of songs and information on the artist.