[dtn] Re: I-D Action: draft-ietf-dtn-eid-pattern-10.txt

[Erik Kline <[e-mail]>]

Chairs,

Hopefully this can get a WGLC.  I'm glad this version changes the track to
PS; thanks for that Brian!

-ek

On Fri, Aug 21, 2026 at 8:40 AM Brian Sipos <[e-mail]>
wrote:

> WG,
> This update of the EID Patterns draft makes one change to the text form
> ABNF to address feedback (described below), further restricts allowed
> pattern item characters, and adds new Operational Considerations
> subsections to explain pattern usage options.
>
> The updated text form now allows the initial character of a pattern to be
> the separator "|" in order to positively disambiguate that the text is a
> pattern and not a simple EID. This is a relaxation of earlier ABNF
> constraints. A new Appendix B subsection explains this with an example
> "|ipn:0.3.4" to illustrate it. A strict URI processor will fail to process
> this text, and even a lax one will fail to match the non-scheme text
> "|ipn". This addresses the security consideration of Section 5.2 in an
> optional-to-the-encoder way.
>
> The more restrictive character set (which constrains future schemes'
> pattern definitions) disallows non-printing and blank characters, which was
> recommended during earlier review. It is also formalized by a
> negative-matching ABNF rule "ssp-nochar". I think the current text should
> be good but let me know if there needs to be any further restriction.
>
> Brian S.
>
> On Fri, Aug 21, 2026 at 11:11 AM <[e-mail]> wrote:
>
>> Internet-Draft draft-ietf-dtn-eid-pattern-10.txt is now available. It is a
>> work item of the Delay/Disruption Tolerant Networking (DTN) WG of the
>> IETF.
>>
>>    Title:   Bundle Protocol Endpoint ID Patterns
>>    Author:  Brian Sipos
>>    Name:    draft-ietf-dtn-eid-pattern-10.txt
>>    Pages:   37
>>    Dates:   2026-08-19
>>
>> Abstract:
>>
>>    This document extends the Bundle Protocol Endpoint ID (EID) concept
>>    into an EID Pattern, which is used to categorize any EID as matching
>>    a specific pattern or not.  EID Patterns are suitable for expressing
>>    configuration, for being used on-the-wire by protocols, and for being
>>    easily understandable by a layperson.  EID Patterns include scheme-
>>    specific optimizations for expressing set membership and each scheme
>>    pattern includes text and binary encoding forms; the pattern for the
>>    "ipn" EID scheme being designed to be highly compressible in its
>>    binary form.  This document also defines a Public Key Infrastructure
>>    Using X.509 (PKIX) Other Name form to contain an EID Pattern and a
>>    handling rule to use a pattern to match an EID.
>>
>> The IETF datatracker status page for this Internet-Draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-dtn-eid-pattern/
>>
>> There is also an HTML version available at:
>> https://www.ietf.org/archive/id/draft-ietf-dtn-eid-pattern-10.html
>>
>> A diff from the previous version is available at:
>> https://author-tools.ietf.org/iddiff?url2=draft-ietf-dtn-eid-pattern-10
>>
>> Internet-Drafts are also available by rsync at:
>> rsync.ietf.org::internet-drafts
>>
>>
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