EdgeTags

EdgeTags[g] gives the list of tags for all edges in the graph g.

EdgeTags[g, {u, v}] gives the list of tags for edges between u and v.

Examples

Get edge tags:

g = EdgeTaggedGraph[{1 -> 2, 2 -> 3} -> {"a", "b"}];
EdgeTags[g]
(* {"a", "b"} *)

Tags between specific vertices:

EdgeTags[g, {1, 2}]

Please visit the official Wolfram Language Reference for more details.