How to get endpoints info from a selected edge

Question

Looking at a complex nested graph in the UI, I'd like to obtain more information about a selected edge's endpoints.  For instance, the id of the source and target attr's, possibly their descriptions. and so on. Seems like a very natural thing to want? Otherwise I'll need to encode this into the edge data description field leading to a file size increase.

A further refinement would be context menu entries to navigate to either endpoint, expanding nodes as necessary.

Comments

Is this request related to yEd, the free diagram editor? If so, can you please explain what you mean by "id of the source and target attr's" and "expanding nodes as necessary"?