What is a node

Should be obvious that nodes are not reducible like words can. Of course a node can be reduced to its component parts (if they are thought of as writing) but that is hardly what constitutes the node. A node could just as easily contain a sound, a film, an image, a letter, or any combination of these.

Adrian Miles: Hypertext syntagmas: cinematic narration with links A performative hypertext presented by Journal of Digital Information