The Broadcast Wave Format (BWF) is an open standard that is widely recommended as the archival master for audio preservation. It consists of uncompressed audio. It is an extension of the WAV format, since it may contain metadata which describes the format of the audio data and the encoding method, and carries a sample-accurate time stamp that can be used to place related files in the proper sequence. BWF can wrap either MPEG or LPCM encoding, although for long-term preservation the use of LPCM is preferred.  

BWF is a DANS preferred container format for Audio. Read more about Audio.