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What is the format of the annotation files?

April 26, 2017annotation files format

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What is the format of the annotation files?

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Most annotations occupy two bytes, of which 10 bits contain the time interval (in units of sample intervals) from the previous annotation, and 6 contain an annotation type code. Special type codes allow for annotations at intervals that exceed 1023 sample intervals, and for other numeric and text fields to be associated with individual annotations. See annot(5) in the WFDB Applications Guide for details.