The ABC Notation interpreted by NASequencer confirms to the abc music standard 2.1. See original website for the details.
NASequencer has following limitations.
- Supported file encodings are ascii and utf-8 only
- The notation only for printed score that does not affect playback is ignored
- Not support outdated syntax on version 2.0 or lower
- On "Include field", included file must be placed in the directory that is specified by Preferences - Include Search Path