[dtn] DTN URI structure and patterns

[Brian Sipos <[e-mail]>]

All,
In RFC4838 [1] there is mention of the potential to "provision for wildcarding some portion of an EID" but none of the DTN-scheme URIs that I've come across or the structure in BPbis [2] really indicate what wildcarding would look like or how it would operate.
Is wildcarding currently in use for DTN-scheme URIs?
What exactly would the wildcard cover; a portion of the "node-name" or "demux" part, or both, or something else?

It's also not clear what the expected "node-name" structure of a DTN-scheme URI is supposed to look like or behave like. I've seen some examples with pseduo-domain-names used for node names, but are these actually structured names or just opaque "1*VHCAR" as [2] indicates?
Are node names "one.net" and "two.net" in any way related? Do existing tools use some relationships like these?

These questions are coming up as a result of looking at what PKIX on a DTN would look like and trying to head off some struggles which have already caused lots of pain in PKIX for DNS names [3].

[1] https://tools.ietf.org/html/rfc4838#section-3.3
[2] https://tools.ietf.org/html/draft-ietf-dtn-bpbis-24#section-10.7
[3] https://tools.ietf.org/html/rfc6125#section-7.2