Message is a System Exclusive Message.

Continue is an incomplete sysex that is following Start or SysExContinue but not ending it.

End is an incomplete sysex that is continuing Start or Continue and ending it.

Escape is a sysex escape sequence with a prefixed 0xF7 it may only used within SMF files (not for live MIDI).

SysExStart is an incomplete sysex that is the start of several sysexes (casio style) i.e.

SysEx is a sysex that is complete (i.e.