It looks like your message was cut off. Do you mean “Format” as in a file format (e.g., EDF+), an HTML/data attribute like span data-sd-animate, or something else? I’ll proceed with a brief overview of both; tell me which you want more detail on.
- File format (EDF/EDF+): EDF (European Data Format) and EDF+ are standard file formats for storing biosignal data (EEG, PSG). EDF+ adds annotations, discontinuities, and additional metadata. Key points:
- Structure: fixed-length 256-byte header, followed by signal headers and data records.
- Channels: each channel has label, transducer, physical/min/max, digital/min/max, prefilter, samples per record.
- Data: typically 16-bit integers per sample; scaling converts to physical units.
- Annotations: stored in a dedicated signal with UTF-8 text (EDF+), allowing event markers and timing.
- Use cases: sleep studies, EEG, long-term monitoring; supported by many analysis tools.
- HTML attribute (data-sd-animate on a span): custom data- attributes store private data for scripts/CSS. Example:
- Purpose: likely used by a JS library named “sd” to trigger animations.
- Behavior: no built-in meaning to browsers; scripts read the attribute and perform actions.
- Usage: Text — JS selects [data-sd-animate] and applies animation classes or styles.
- Accessibility: ensure animations can be disabled and content remains readable without them.
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