Full specifications of EDF and EDF+ 
The original 1992 spec: EDF
   
The 2003 extension: EDF+
   
 
EDF(+) extension for
longintegers and floats
  
EDF(+) standard texts and
polarity rules.
Additional guidelines and plug-ins 
A filename convention to time-synchronize video files with EDF(+)
A DC-attenuator that fits large DC offsets in traditional amplifier ranges and EDF(+)
 
EDF and EDF+: guidelines for programmers
EDF only: FAQ list