Kaiser speaks here of the issue of missing index entries in commercial and even library-based indexes versus the personal indexing of one's own card index/zettelkasten.

Some of the problem comes down to a question of scale as well as semantics, but there's also something tied up with the levels of specificity from broad category headwords to more specific, and finally down to the level of individual ideas. Some of this can be seen in the levels of specificity within the Syntopicon though there aren't any (?, doublecheck) of links from one idea directly to another.

Note that while there may be direct links from a single idea to another, there is still infinite space by which one can interpose additional ideas between them.

Jerry Michalski says that The Brain provides him with a "neighborhood perspective" of ideas when he reduces the external link number for his graph down to 1.

This is similar to Nicholas Luhmann's zettelkasten which provided neighborhoods of related notes based on distance from any particular note.

Also similar to oral cultures who relied on movement through their environment for encoding memories and later remembering them. [I'll use the tag "environmental memory" to track this until a better name comes along.]

reply to u/JonasanOniem at https://www.reddit.com/r/Zettelkasten/comments/16ss0yu/comment/k2buxsc/?utm_source=reddit&utm_medium=web2x&context=3

In digital contexts it is much easier and very common to create orphaned notes that aren't connected to anything. In a paper zettelkasten, you are forced to file your note somewhere and give it a number (only to be able to find it again—it's difficult, but try not to make the mistake of conflating your number with the idea of category). The physical act of placing it in your slipbox creates an implicit link to the things around it. As a result, your four notes would all initially seem to be directly related because they're nearby, but over time, they will naturally drift apart as you intersperse new notes between and among them. Though if they're truly directly interrelated, you can write down explicit links from notes at one end of your thought space to notes which seem distant.

In your example, you may see some sort of loose link between your first and fourth notes relating to music. While it may be a distant one, given what you have, putting marching band "next to" digestible music is really the only place to put it. Over time, you'll certainly find other notes that come between them which will tend to split them apart and separate them by physical distance, but for now, if it's what you've got, then place them into the same neighborhood by giving them addresses (numbers) to suggest they live nearby. (Some note applications like Obsidian make this much harder to do, and as a result orphaned notes will eventually become a problem.)

This physical process is part of the ultimate value of building knowledge from the bottom up. Like most people, you've probably been heavily trained to want to create a hierarchy from the top down (folder-based systems on computers of the late 20th century are a big factor here) which is exactly why you're going to have problems like this at the start. You'll want to place that music note somewhere else, or worse, orphan it. For some people who may not be able to immediately trust the process, it can be easier to create a few dozen or a hundred notes and then come back to them later to file and arrange them. This will allow you to seed some ground from which to continually build and help to bridge the gap between the desire to move top-down in a system designed to move from bottom-up.

Depending on one's zettelkasten application (Obsidian, Zettlr, Logseq, The Archive, et al.) some do a better job of allowing the creation of "soft links" versus the more explicit hard or direct links (usually using [[WikiLinks]]). The soft links are usually best done by providing a number that places one note into proximity with another, but not all systems work this way. As a result, it's much easier to build a traditional commonplace book with Obsidian than it is to build a Luhmann-artig zettelkasten (see: https://boffosocko.com/2022/10/22/the-two-definitions-of-zettelkasten/). The concept of tags/categories in many systems is another form of soft link that can hold ideas together, so use this affordance if your application offers it as well. But also keep in mind that if sociology is your life's work, you'll eventually amass such a huge number of digital notes tagged with "sociology" that this affordance will become useless as it won't scale well for discovery and creating links.

reply to u/JonasanOniem at https://www.reddit.com/r/Zettelkasten/comments/16ss0yu/linking_new_notes/

This sort of practice is harder when you start out in most digital apps because there is usually no sense of "closeness" of ideas in digital the way that is implied by physical proximity (or "neighborhood") found in physical cards sitting right next to or around each other. As a result, you have to create more explicit links or rely on using tags (or indexing) when you start. I've not gotten deep into the UI of Zettlr, but some applications allow the numbering (and the way numbered ideas are sorted in the user interface) to allow this affordance by creating a visual sense of proximity for you. As you accumulate more notes, it becomes easier and you can rely less on tags and more on direct links. Eventually you may come to dislike broad categories/tags and prefer direct links from one idea to another as the most explicit tag you could give a note . If you're following a more strict Luhmann-artig practice, you'll find yourself indexing a lot at the beginning, but as you link new ideas to old, you don't need to index (tag) things as heavily because the index points to a card which is directly linked to something in the neighborhood of where you're looking. Over time and through use, you'll come to recognize your neighborhoods and the individual "houses" where the ideas you're working with all live. As an example, Luhmann spent his life working in sociology, but you'll only find a few links from his keyword register/subject index to "sociology" (and this is a good thing, otherwise he'd have had 90,000+ listings there and the index entry for sociology would have been utterly useless.)

Still, given all this, perhaps as taurusnoises suggests, concrete examples may help more, particularly if you're having any issues with the terminology/concepts or how the specific application affordances are being presented.

Warburg's zettelkasten does not appear to be a simple bibliographic classification system according to Steiner. He indicates that the books in Warburg's library are arranged according to Warburg's idea of »guten Nachbarschaft« or "good neighborliness" whereby they followed his subjective interests an ordering that is reflected in the labels of his note boxes and various tabs which subsection notes within them.