A readable foundation
XML headers describe signal data and its metadata. Unicode text supports information in different languages.
Open eXchange Data Format
Physiological data.
An open standard.
Signals tell part of the story. OpenXDF brings the context—an open specification for exchanging physiological recordings, annotations, and clinical metadata.
Read the specification
Version 1.5 PDF
The format
More than a waveform.
Clinical context, included
Exchange annotations, montages, patient information, and sleep-scoring data—with or without the signals themselves.
Work with existing data
Reference existing signal files, including EDF and EDF+. Describe each signal’s sampling frequency and sample size independently.
The specification
Start with the standard.
The specification defines the format, implementation requirements, data types, and a complete example.
Latest published specification
OpenXDF 1.5
Previous specifications 5 versions
Historical versions are retained for reference. For implementation, start with version 1.5.