# Graph view

A zettelkasten is a directed graph. Neuron also has the notion of , which is a subset of this graph established by having zettels “branch off” to other zettels.

## z-index

The z-index page (at /z-index.html; also linked in the header) displays the zettelkasten for all in the zettelkasten graph.

A backlink of a zettel is a zettel that links to it. If that link is a folgezettel link, it is called an “uplink”. Each zettel has its Uplink Tree displayed at the top.