Niklas Luhmann's zettelkasten system doesn't impose a heirarchy upon it's contents and in some ways its structure anticipates the ideas of hypertext and the internet's structure.

Also similar to the idea from Umberto Eco: https://hypothes.is/a/jqug2tNlEeyg2JfEczmepw

This section is almost exactly the same as Umberto Eco's description of a slip box practice:

No piece of information is superior to any other. Power lies in having them all on file and then finding the connections. There are always connections; you have only to want to find them. -- Umberto Eco. Foucault's Pendulum

See: https://hypothes.is/a/jqug2tNlEeyg2JfEczmepw

Interestingly, these structures map reasonably well onto Paul Baran's work from 1964:

The subject heading based filing system looks and functions a lot like a centralized system where the center (on a per topic basis) is the subject heading or topical category and the notes related to that section are filed within it. Luhmann's zettelkasten has the feel of a mixture of the decentralized and distributed graphs, but each sub-portion has its own topology. The index is decentralized in nature, while the bibliographical section/notes are all somewhat centralized in form.

Cross reference:<br /> Baran, Paul. “On Distributed Communications: I. Introduction to Distributed Communications Networks.” Research Memoranda. Santa Monica, California: RAND Corporation, August 1964. https://doi.org/10.7249/RM3420.

https://www.arthurperret.fr/blog/2022-05-20-et-toi-qu-est-ce-que-tu-fiches.html

In "On Intellectual Craftsmanship" (1952), C. Wright Mills talks about his methods for note taking, thinking, and analysis in what he calls "sociological imagination". This is a sociologists' framing of their own research and analysis practice and thus bears a sociological related name. While he talks more about the thinking, outlining, and writing process rather than the mechanical portion of how he takes notes or what he uses, he's extending significantly on the ideas and methods that Sönke Ahrens describes in How to Take Smart Notes (2017), though obviously he's doing it 65 years earlier. It would seem obvious that the specific methods (using either files, note cards, notebooks, etc.) were a bit more commonplace for his time and context, so he spent more of his time on the finer and tougher portions of the note making and thinking processes which are often the more difficult parts once one is past the "easy" mechanics.

While Mills doesn't delineate the steps or materials of his method of note taking the way Beatrice Webb, Langlois & Seignobos, Johannes Erich Heyde, Antonin Sertillanges, or many others have done before or Umberto Eco, Robert Greene/Ryan Holiday, Sönke Ahrens, or Dan Allosso since, he does focus more on the softer portions of his thinking methods and their desired outcomes and provides personal examples of how it works and what his expected outcomes are. Much like Niklas Luhmann describes in Kommunikation mit Zettelkästen (VS Verlag für Sozialwissenschaften, 1981), Mills is focusing on the thinking processes and outcomes, but in a more accessible way and with some additional depth.

Because the paper is rather short, but specific in its ideas and methods, those who finish the broad strokes of Ahrens' book and methods and find themselves somewhat confused will more than profit from the discussion here in Mills. Those looking for a stronger "crash course" might find that the first seven chapters of Allosso along with this discussion in Mills is a straighter and shorter path.

While Mills doesn't delineate his specific method in terms of physical tools, he does broadly refer to "files" which can be thought of as a zettelkasten (slip box) or card index traditions. Scant evidence in the piece indicates that he's talking about physical file folders and sheets of paper rather than slips or index cards, but this is generally irrelevant to the broader process of thinking or writing. Once can easily replace the instances of the English word "file" with the German concept of zettelkasten and not be confused.

One will note that this paper was written as a manuscript in April 1952 and was later distributed for classroom use in 1955, meaning that some of these methods were being distributed from professor to students. The piece was later revised and included as an appendix to Mill's text The Sociological Imagination which was first published in 1959.

Because there aren't specifics about Mills' note structure indicated here, we can't determine if his system was like that of Niklas Luhmann, but given the historical record one could suppose that it was closer to the commonplace tradition using slips or sheets. One thing becomes more clear however that between the popularity of Webb's work and this (which was reprinted in 2000 with a 40th anniversary edition), these methods were widespread in the mid-twentieth century and specifically in the field of sociology.

Above and beyond most of these sorts of treatises on note taking method, Mills does spend more time on the thinking portions of the practice and delineates eleven different practices that one can focus on as they actively read/think and take notes as well as afterwards for creating content or writing.

My full notes on the article can be found at https://jonudell.info/h/facet/?user=chrisaldrich&max=100&exactTagSearch=true&expanded=true&addQuoteContext=true&url=urn%3Ax-pdf%3A0138200b4bfcde2757a137d61cd65cb8

Julius Reizen in reviewing over Umberto Eco's index card system in How to Write a Thesis, defines his own "insurance card" as one which contains "hard-to-classify thoughts, questions, and areas for further inquiry". These he would keep together so that they don't otherwise get lost in the variety of other locations one might keep them

These might be akin to Ahrens' "fleeting notes" but are ones which may not easily or even immediately be converted in to "permanent notes" for one's zettelkasten. However, given their mission critical importance, they may be some of the most important cards in one's repository.

link this to - idea of centralizing one's note taking practice to a single location

Is this idea in Eco's book and Reizen is the one that gives it a name since some of the other categories have names? (examples: bibliographic index cards, reading index cards (aka literature notes), cards for themes, author index cards, quote index cards, idea index cards, connection cards). Were these "officially" named and categorized by Eco?

May be worthwhile to create a grid of these naming systems and uses amongst some of the broader note taking methods. Where are they similar, where do they differ?

Multi-search tools that have full access to multiple trusted data stores (ostensibly personal ones across notebooks, hard drives, social media services, etc.) could potentially solve the problem of needing to remember where you noted something.

Currently, in the social media space especially, this is not a realized service.

Umberto Eco's book How to Write a Thesis (MIT Press, 2015, #) can broadly be thought of as a zettelkasten system, but it advises a separate system for each project or writing assignment. This is generally good advice, and potentially excellent for students on a one-time basis, but it prevents one from benefitting from the work over multiple projects or even a lifetime.

In some sense, a more traditional approach, and one seen used in Niklas Luhmann's example is to keep different sections separated by broad topics.

Niklas Luhmann's zettelkasten #1 had 108 broad topics (along with a bibliography and a subject index), and zettelkasten #2 had 11 broad topics. (Cross reference: https://niklas-luhmann-archiv.de/bestand/zettelkasten/inhaltsuebersicht)

The zettelkasten structure allowed a familiar "folder" like top level structure, but the bibliographic and subject indices allowed them to interlink ideas from one space to the next for longer term work on multiple projects simultaneously.

Is physics open or closed?

Could a play, made in a zettelkasten-like structure, be performed in a way so as to keep a consistent authorial voice?

What potential applications does the idea of opera aperta have for artificial intelligence? Can it be created in such a way as to give an artificial brain a consistent "authorial voice"?

If Umberto Eco makes a distinction between the works which are open in interpretation and works like music which are open in their structural sense, what would he have made of viewing a work like a zettelkasten which could potentially be open in both respects?

link to: https://hyp.is/dBTiCsDWEeyyn7dYEp3oUA/en.wikipedia.org/wiki/Open_text

Is the zettelkasten potentially an example of one of the most open texts one can create?

I believe Umberto Eco kept one or had a note taking system similar to it.