These are collections of
pieces grouped one way or another.
Some imply extended narratives, others are unstructured.
Nearly all of this work attempts in some way to avoid linearity.
A large-scale textual virtual world.
In my opinion, textual virtual worlds fulfill the formal and thematic agendas of Postmodernism.
Along with other scholarly fora,
The Cambridge Companion to Postmodernism agrees,
citing TriadCity as its culminating example of literary Postmodernism.
This is further explained
on the SmartMonsters website.
There's also a good
article on TriadCity: