Support content-dependant IDs

[j-steinbach]

At the moment Neuron/Emanote either use completely randomized IDs or title IDs, the original Zettelkasten however uses content-dependent semi-structured IDs: 7-2m(visualized). Observe how the Zettel form a "Zettelstrang" (=Zettel thread = note thread). Also note how most Zettel only have one or two connections/links.A good example/explanation is given here and here -- see how the Folgezettel hierarchy and the IDs correlate? E: See also here.

For Emanote this would mean to generate IDs based on the current note context (i.e. what is the current ID, what is the next sequential and unique ID):

1/1 Card with notes referring to a certain topic
    1/1a Card containing notes referring to a particular idea from card 1/1
    1/1b Continuation of notes from card 1/1a
        1/1b1 Card containing notes referring to a particular idea from card 1/1b
            1/1b1a Card containing notes referring to a particular idea from card 1/1b1
            1/1b1b Continuation of notes from card 1/1b1a
        1/1b2 Continuation of notes from card 1/1b1
    1/1c Card containing notes referring to a particular idea from card 1/1
1/2 Continuation of notes from card 1/1

I like to repeat this over and over, but Zettel should be meaningful. In my opinion this extends to their IDs as well -- I should be able to picture a thread of thought from a bunch of IDs. That is also why -imo- random uIDs are bad "hygiene" for a ZK.

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Some more examples of structured notes/IDs and their application:

• 12.03 Payroll schedule 2018: johnny.decimal. Here someone gives their workflow.
• lang.python.data.boolean: Dendron Hierarchies: 1 2
• PARA, semi-structured, no ID

How are structured IDs different from using titles as IDs?

A note with the ID 200.32 aunt jena birthday or people.aunt-jena.birthday.90 or 17,3bb7 might have the title Aunt Jena's 90th birthday. The title is purely human-readable, whereas the IDs provide specific structural information.

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Possibly relevant discussions:

srid/neuron#399
srid/neuron#148
srid/neuron#151
srid/neuron#387