Many systems are organized hierarchically. The CERNDOC documentation system is an example, as is the Unix file system, and the VMS/HELP system. A tree has the practical advantage of giving every node a unique name. However, it does not allow the system to model the real world. For example, in a hierarchical HELP system such as VMS/HELP, one often gets to a lead on a tree such as:
HELP COMPILER SOURCE_FORMAT PRAGMAS DEFAULTS
only to find a reference to another leaf: Please see
HELP COMPILER COMMAND OPTIONS DEFAULTS PRAGMAS
and it is necessary to leave the system and re-enter it. What was needed was a link from one node to another, because in this case the information was not naturally organized into a tree.
This, I think, is the brilliance of Notion, and what makes it one of the best examples of “fidelity to digital information” that I’ve come across. The structure of the app reflects the structure of the web itself: digital content is purposefully formatted, like semantic HTML elements, and exists in a hierarchical structure (directories on the web, nested pages in Notion), yet can be linked and referenced to create a complex network of information. And pages in Notion reveal the structure of the information: when nesting a page within a page, the child page always displays on the parent page. There’s no way to create a child page that doesn’t display on a parent page, no way to obscure the structure of the information. The semantic structure of Notion reflects the semantic structure of the web itself.
Truchet's approach was more topological than geometric, and the qualitative aspects of pattern take priority over the metric ones. His principles provide a kind of metaphor for the hierarchy of separation and connection in all things.
It is true that [the artist], like everybody else, derives remuneration from his work (though not, strictly speaking, profit in the financial sense, of the word, since what he invests in his work is not money but time and skill, whose returns cannot be calculated in percentages). The remuneration is frequently beyond the amount necessary to enable him to go on working. What is remarkable about him is the way in which he commonly employs the escape-from-work which the extra remuneration allows him. If he is genuinely an artist, you will find him using his escape-from-work in order to do what he calls “my own work”, and nine times out of ten, this means the same work (i.e. the exercise of his art) that he does for money. The peculiar charm of his escape is that he is relieved, not from the work but from the money.
What distinguishes him here from the man who works to live is, I think, his desire to see the fulfilment of the work.