A note is an element of a Tinderbox file, it has a title, a text body, and attributes; the title and text are themselves attributes of the note ($Name and $Text). A note is best thought of as the 'atomic' entity of information within a Tinderbox file.
A note may also act as a prototype for other notes.
A note is edited via the text pane, the right side of the default window layout This displays information about the currently selected note.
Many other aspects of Tinderbox such as agents, separators and adornments are effectively just specialised notes.
Notes are often referenced, or their location dis described by, Paths.
Any note containing other notes is also regarded as a 'container'; put another way, a container is any note that has children.