OpenXDF
Filename extension |
.xdf |
---|---|
Uniform Type Identifier (UTI) | org.openxdf.xdf |
Latest release | 1.2 (June 30, 2009) |
Type of format | Electroencephalography and Polysomnography |
The Open eXchange Data Format, or OpenXDF, is an open, XML-based standard for the digital storage and exchange of time-series physiological signals and metadata. OpenXDF primarily focuses on electroencephalography and polysomnography.
History[]
Neurotronics began work on OpenXDF in 2003 with the goal of providing a modern, open, and extensible file format with which clinicians and researchers can share physiological data and metadata, such as signal data, signal montages, patient demographics, and event logs.[citation needed]
Neurotronics released the first draft of the OpenXDF Specification just before the 18th meeting of the in 2004. Neurotronics has since relinquished control of the format to the .
As of version 1.0, OpenXDF is 100% backward compatible with the European Data Format (EDF), the current de facto standard format for physiological data exchange.
Features[]
Tiered structure[]
OpenXDF is a tiered framework designed to allow standardized and custom specializations of the format while enforcing a common foundation that provides a high-level of compatibility between unrelated systems.
Metadata[]
OpenXDF expands on EDF by providing standardized support for extensive patient information, display montages, annotations, and scoring information.
Unicode support[]
OpenXDF requires the use of a XML 1.0 compliant parser that supports UTF-8 and UTF-16.
Signal configuration[]
OpenXDF supports fully and independently configurable data signals. Each signal specifies its byte order, whether its samples are signed, the size of its samples, and its sampling rate.
Security[]
OpenXDF supports encryption of the XML file using TwoFish in Cipher Feedback (CFB) mode with a 256-bit key created from a UTF-8 encoded password hashed with SHA-256. In addition, OpenXDF supports integrity verification using a SHA-512 hash of the original XML file.
See also[]
- European Data Format (EDF)
References[]
External links[]
- Electroencephalography
- Industry-specific XML-based standards