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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.