Rules are part of action code. Here is a video you might find helpful: Tinderbox Training Video 48 - Demystifying Action Code Part 1.
@GaiusScotius I hope to have a training video done on links shortly. In the meantime, I’d like to emphasize, as noted above, that data can be transferred up and down the change of links, both as one-time actions based on link types and programmatically through action code. This is extremely powerful. Links can be viewed in map view, in the link pane, hyperbolic view. You can also is there are links to a note in all the other view. Using the link pane you can actually see into the text of notes and even “tear-off” a linked note into a standalone text window. This torn off note editable, including the attributes. Again, I’ll include a review of this in my video.