Discussion about syntax for link types/attributes: Add support for link types
Link types can already be visualized in Neo4j Graph View Plugin.
It works with any naming style (Luhman, timestamp, Obsidian title, …) because structure is represented by link type (for now specified before link in markdown).
Maybe Luhman sequences can be visualized by mentioned ‟Hierarchical layout” for “continuation”-type links, reducing significance of other link-types
Linking to group of nodes requested by @rui in post #10 ↑ can be done by creating file for desired group. That file contains list of “member”-type links to each node/file which belongs to the group.