Fix the link to add-id.  Raise compacting to an H3.
@@ -42,7 +42,7 @@ in the output file will have empty `id` values.
* Existing `id` column values will not be checked for duplication.
!!! note
- See [`kgtk add-id`](https:../add-id) if you wish to generate new `id` column values or
+ See [`kgtk add-id`](https:../add_id) if you wish to generate new `id` column values or
manipulate existing `id` column values.
[`kgtk calc`](https://../calc) may also be useful for modifying `id` column values.
@@ -63,7 +63,11 @@ When one or both of the input edge file are denormalized, the output file will a
The output file will contain the union of the additional columns from the input files, with empty values
when an input file does not contain a nonempty value.
-!!! note
+### Joining on `node1`, `label`, and `node2`
+
+
+### Compacting Joined Edges
+
The left and right edges will remain distinct in the output file,
even if the (`node1`, `label`, `node2, and `id`) fields match.
If you want to create a single edge with additional columns from
