Is there a way to make "close siblings"?

[ooker777]

I am making an issue tree, and I want to add the logical operator AND and OR for the solutions of the issues. For example, for an issue, you may solve it with solution 1a and solution 1b, or you can solve it with solution 2. So while they are siblings, 1a and 1b are close siblings. Is there a way to represent this relationship?

[michaelpporter]

In the v4 rewrite this is doable by defining your own edge field for the tight grouping, separate from the normal sibling field.

Regular siblings use the built-in same field. For your "close siblings" (the AND-group — 1a and 1b), create a dedicated field, e.g. and (or co-sibling), under Settings → Breadcrumbs → Edge fields. Then in your notes:

---
same: ["[[Solution 2]]"]      # loose sibling (OR alternative)
and: ["[[Solution 1b]]"]       # close sibling (AND-group)
---

If you want it to be symmetric (so 1b also points back to 1a automatically), add a transitive rule [and] -> and under Implied relations — same pattern the default same field uses.

That gives you two distinct sibling relationships you can style and traverse independently. Closing as resolved — v4 makes this a matter of adding a custom field; shout if you hit a snag.