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OGF DFDL: What Other Materials needed for Updated submission of DFDL to ISO
by Mike Beckerle 24 Nov '25

24 Nov '25

Alan, When DFDL was first submitted as a PAS standard to ISO, besides the OGF DFDL document itself, I believe there was additional material also that was part of making up the overall submission package. I'm a bit unclear on what materials are part of OGF being accepted as a PAS submitter, and where that material ends, versus which materials accompanied the specific PAS submission of DFDL. I.e., which materials would also need to be updated if a revised DFDL version were submitted. Can you advise on what these additional documents would be to make up a complete submission "package"? An update to DFDL is quite possibly in the works, not imminently, but in a year or so, but I am retiring at the end of 2025 so will be less active going forward. I want to set the stage on what all is involved in creating an updated DFDL spec., beyond just the spec itself, for those still working on it. Thank you for any info Mike Beckerle Apache Daffodil PMC | daffodil.apache.org OGF DFDL Workgroup Co-Chair | www.ogf.org/ogf/doku.php/standards/dfdl/dfdl Owl Cyber Defense | www.owlcyberdefense.com

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Changing some issues from DFDL v2.0 to "Research Topic" label
by Mike Beckerle 05 Nov '25

05 Nov '25

I claim these items are really open-ended research things. Not ready to be considered for specification. I propose relabeling them by removing the DFDL v2.0 label, and adding a "Research Topic" label. - https://github.com/OpenGridForum/DFDL/issues/70 (non-XSD syntax – escape from XML) - https://github.com/OpenGridForum/DFDL/issues/63 (pathological DFDL parser behavior) - https://github.com/OpenGridForum/DFDL/issues/13 (variable or wildcard path step) - The primary feature of ESA’s DFDL4Space implementation - https://github.com/OpenGridForum/DFDL/issues/40 (ICU DecimalFormat class updates) - https://github.com/OpenGridForum/DFDL/issues/27 (embedded XML and JSON in data) - Daffodil attempted this feature, but it’s definitely wrong. Must be part of parsing to verify the XML/JSON are well-formed. We did have a real use case for this.). - https://github.com/OpenGridForum/DFDL/issues/23 (improvements where DFDL v1.0 spec is weak, need better examples, improved discussion text) - https://github.com/OpenGridForum/DFDL/issues/20 (bidirectional text) - Requires a R-to-L languages expert to specify this. This allows the remaining DFDL v2.0 labeled things to be more relevant, as they are shorter term things that are cleanups or are features people actually need. (About half of them are already implemented in Daffodil). In fact the remaining things labeled DFDL v2.0 are possibly just a DFDL v1.1 spec., as they're not as far out as any of the above listed issues, and might be considered a point release, not a major release. Or at least we can have that discussion. But the above list are clearly non-point release items. Thoughts? Mike Beckerle OGF DFDL Workgroup Co-Chair | www.ogf.org/ogf/doku.php/standards/dfdl/dfdl Apache Daffodil PMC | daffodil.apache.org Owl Cyber Defense | www.owlcyberdefense.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy <http://www.ogf.org/About/abt_policies.php>

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DFDL working rev 1.2.0 - ISO Formatted but still "OGF content" version of Spec
by Mike Beckerle 02 Oct '25

02 Oct '25

This took a few hours, but worked. See: https://github.com/OpenGridForum/DFDL/blob/master/docs/draft-gwdrp-dfdl-v1.… There are also PDF and HTML versions of the same in the same folder. There's hidden text in the MS-Word ".docx" file explaining a few aspects of things. That hidden text doesn't show in the PDF nor HTML versions. This is an "OGF" document in that it has all the OGF specified sections, change history page, etc. They just use different fonts, A4 pages, and some OGF backmatter sections are relocated to the front matter to facilitate dual maintenance of an OGF-track and ISO-PAS submission flavor of this document. This is setup so making a new ISO submission from this requires changing the page headings/footings (while preserving their size so page breaks don't change), and replacing the front matter pages. Note: there are some ISO formatting things I chose not to do. One is changing all table captions to be at the top of the table. The example ISO standards document template is also uploaded so you can see the preferred style and ISO front matter. https://github.com/OpenGridForum/DFDL/blob/master/docs/Word_template_for_IS…

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FYI: ASN.1 Encoding Control Notation (ECN) compared to DFDL
by Mike Beckerle 01 Oct '25

01 Oct '25

ASN.1 ECN has been an ISO standard thing for a while. ECN lets you add representation information to the ASN.1 schema, which sounds roughly DFDL-like. So now with DFDL being an ISO standard the obvious thing arises to compare/contrast them. So I did a quick exercise in that direction. An AI (with my help) created an equivalent ASN.1 Schema + ECN from the FakeTDL format specification text *document *on github. (FakeTDL is a small example of a fictitious military tactical data link on github DFDLSchemas) This PR exhibits that ASN.1 and ECN code and does some comparison. They’re not particularly equivalent – some limitations of ECN become apparent even in this small example. https://github.com/DFDLSchemas/faketdl/pull/12/files This is the chatGPT5 session I used to create the example (fairly long) https://chatgpt.com/share/68dd112a-3140-800f-ab7c-c0d043c0460a I asked it a bunch more things about ASN.1 ECN that go beyond just this example. By the end of this it was speculating too much, and confusing some concepts, but overall this was quite useful. Mike Beckerle Apache Daffodil PMC | daffodil.apache.org OGF DFDL Workgroup Co-Chair | www.ogf.org/ogf/doku.php/standards/dfdl/dfdl Owl Cyber Defense | www.owlcyberdefense.com

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Synced invitation: DFDL Workgroup - DFDL Spec Issues and Actions @ Thu Aug 14, 2025 11am - 12pm (EDT) (dfdl-wg@ogf.org)
by mbeckerle.dfdl＠gmail.com 09 Sep '25

09 Sep '25

This email keeps the event up to date in your calendar. DFDL Workgroup - DFDL Spec Issues and Actions Thursday Aug 14, 2025 ⋅ 11am – 12pm Eastern Time - New York Location Google Meet https://www.google.com/maps/search/Google+Meet?hl=en Join with Google Meet https://meet.google.com/ifg-hknz-ysw?hs=224 Please send email to open discussions and add agenda for this meeting. If there are no specific topics I will cancel the meeting. Organizer mbeckerle.dfdl(a)gmail.com mbeckerle.dfdl(a)gmail.com Guests mbeckerle.dfdl(a)gmail.com - organizer mbeckerle(a)gmail.com - optional smhdfdl(a)gmail.com - optional jens.jensen(a)stfc.ac.uk - optional alan.sill(a)ttu.edu - optional mbeckerle(a)owlcyberdefense.com - optional braddk(a)us.ibm.com - optional dfdl-wg(a)ogf.org - optional wiloneil(a)uk.ibm.com - optional wolfgang.ziegler(a)z-rands.de - optional ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

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Updated invitation with note: DFDL Workgroup - DFDL Spec Issues and Actions @ Monthly from 11am to 12pm on the second Thursday from Thu Oct 12, 2023 to Wed Sep 10 (EDT) (dfdl-wg@ogf.org)
by Mike Beckerle 09 Sep '25

09 Sep '25

This event has been updated with a note: "I am unable to meet Thursdays. Separate email thread will be about rescheduling. " Changed: time DFDL Workgroup - DFDL Spec Issues and Actions Monthly from 11am to 12pm on the second Thursday from Thursday Oct 12, 2023 to Wednesday Sep 10 Eastern Time - New York Location Google Meet https://www.google.com/maps/search/Google+Meet?hl=en Join with Google Meet https://meet.google.com/ifg-hknz-ysw?hs=224 Please send email to open discussions and add agenda for this meeting. If there are no specific topics I will cancel the meeting. Organizer Mike Beckerle mbeckerle.dfdl(a)gmail.com Guests Mike Beckerle - organizer frostmar(a)uk.ibm.com Mike Beckerle - optional alan.sill(a)ttu.edu - optional mbeckerle(a)owlcyberdefense.com - optional braddk(a)us.ibm.com - optional dfdl-wg(a)ogf.org - optional smhdfdl(a)gmail.com - optional wiloneil(a)uk.ibm.com - optional jens.jensen(a)stfc.ac.uk - optional wolfgang.ziegler(a)z-rands.de - optional View all guest info https://calendar.google.com/calendar/event?action=VIEW&eid=amJnNXNxYzdwZmlo… Reply for dfdl-wg(a)ogf.org and view more details https://calendar.google.com/calendar/event?action=VIEW&eid=amJnNXNxYzdwZmlo… Your attendance is optional. ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

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Synced invitation: DFDL Workgroup - DFDL Spec Issues and Actions @ Monthly from 11am to 12pm on the second Thursday from Thu Oct 10, 2024 to Wed Sep 10 (EDT) (dfdl-wg@ogf.org)
by Mike Beckerle 09 Sep '25

09 Sep '25

This email keeps the event up to date in your calendar. DFDL Workgroup - DFDL Spec Issues and Actions Monthly from 11am to 12pm on the second Thursday from Thursday Oct 10, 2024 to Wednesday Sep 10 Eastern Time - New York Location Google Meet https://www.google.com/maps/search/Google+Meet?hl=en Join with Google Meet https://meet.google.com/ifg-hknz-ysw?hs=224 Please send email to open discussions and add agenda for this meeting. If there are no specific topics I will cancel the meeting. Organizer Mike Beckerle mbeckerle.dfdl(a)gmail.com Guests Mike Beckerle - organizer Mike Beckerle - optional smhdfdl(a)gmail.com - optional jens.jensen(a)stfc.ac.uk - optional alan.sill(a)ttu.edu - optional mbeckerle(a)owlcyberdefense.com - optional braddk(a)us.ibm.com - optional dfdl-wg(a)ogf.org - optional wiloneil(a)uk.ibm.com - optional wolfgang.ziegler(a)z-rands.de - optional ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

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Canceled event with note: DFDL Workgroup - DFDL Spec Issues and Actions @ Thu Aug 14, 2025 11am - 12pm (EDT) (dfdl-wg@ogf.org)
by Mike Beckerle 12 Jun '25

12 Jun '25

This event has been canceled with a note: "Cancelling July and August calls for summer pause. " DFDL Workgroup - DFDL Spec Issues and Actions Thursday Aug 14, 2025 ⋅ 11am – 12pm Eastern Time - New York Location Google Meet https://www.google.com/maps/search/Google+Meet?hl=en Join with Google Meet https://meet.google.com/ifg-hknz-ysw?hs=224 Please send email to open discussions and add agenda for this meeting. If there are no specific topics I will cancel the meeting. Organizer Mike Beckerle mbeckerle.dfdl(a)gmail.com Guests Mike Beckerle - organizer Mike Beckerle - optional smhdfdl(a)gmail.com - optional jens.jensen(a)stfc.ac.uk - optional alan.sill(a)ttu.edu - optional mbeckerle(a)owlcyberdefense.com - optional braddk(a)us.ibm.com - optional dfdl-wg(a)ogf.org - optional wiloneil(a)uk.ibm.com - optional wolfgang.ziegler(a)z-rands.de - optional ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

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Canceled event with note: DFDL Workgroup - DFDL Spec Issues and Actions @ Thu Jul 10, 2025 11am - 12pm (EDT) (dfdl-wg@ogf.org)
by Mike Beckerle 12 Jun '25

12 Jun '25

This event has been canceled with a note: "Cancelling July and August calls for summer pause. " DFDL Workgroup - DFDL Spec Issues and Actions Thursday Jul 10, 2025 ⋅ 11am – 12pm Eastern Time - New York Location Google Meet https://www.google.com/maps/search/Google+Meet?hl=en Join with Google Meet https://meet.google.com/ifg-hknz-ysw?hs=224 Please send email to open discussions and add agenda for this meeting. If there are no specific topics I will cancel the meeting. Organizer Mike Beckerle mbeckerle.dfdl(a)gmail.com Guests Mike Beckerle - organizer Mike Beckerle - optional smhdfdl(a)gmail.com - optional jens.jensen(a)stfc.ac.uk - optional alan.sill(a)ttu.edu - optional mbeckerle(a)owlcyberdefense.com - optional braddk(a)us.ibm.com - optional dfdl-wg(a)ogf.org - optional wiloneil(a)uk.ibm.com - optional wolfgang.ziegler(a)z-rands.de - optional ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

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Summer pause to DFDL Workgroup Calls
by Mike Beckerle 12 Jun '25

12 Jun '25

I am cancelling the DFDL WG Calls for July and August since many people are away during those times. Mike Beckerle Apache Daffodil PMC | daffodil.apache.org OGF DFDL Workgroup Co-Chair | www.ogf.org/ogf/doku.php/standards/dfdl/dfdl Owl Cyber Defense | www.owlcyberdefense.com

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