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5.1 File Types

There are four types of files supported by the WFDB library:

Header Files  contain signal file names and attributes.
Signal Files  contain signals.
Annotation Files  contain annotations.
Calibration Files  contain signal calibration specifications.

The other topics in this section deal with special types of database access:

AHA Format Files  not used for on-line WFDB records.
5.2 Using Standard I/O for Database Files  pipes and I/O redirection for WFDB files.
5.3 Multiplexed Signal Files  signal groups.
5.4 Multi-Frequency Records  signals sampled at different frequencies within within a given record.
5.5 Multi-Segment Records  concatenated records.
5.6 Simultaneous Access to Multiple Records  how to have more than one record open.
5.7 Signals That Are Not Stored in Disk Files  signal I/O using block and character devices.
5.8 Piped and Local Records  records for use with user-created signals.
5.9 NETFILES  input directly from web and FTP servers.
5.10 Annotation Order  the canonical order for annotations: how and why to break the rules, and how to deal with the consequences of doing so.



George B. Moody (george@mit.edu)