We can author graphs in wiki using our own notation inside a About Graph Plugin. This is work-in-progress.
# See also
We desire to describe and manipulate graphs within wiki for purposes other than exploring wiki itself. github 
Here is a graph of page titles that includes this page. This would be good for pattern languages that want to identify preceding and following patterns.
The markup describes a list of nodes connected by arcs. Arcs are marked up as --> or <-- depending on their direction.
There have been many bad attempt to graph the relationships in wikis. Indeed they are so bad I am allergic to digging into them. Here we look at beautiful and meaningful ways to graph wiki.
Here we take thumbnails of wiki pages, and link them to other pages to create a map (or graph) of wiki pages..
Here we look at how wiki can be used to author, or define a network simply be creating wiki links between pages, or by using a special markup within wiki.