Thanks, added gwde-dfdl-experience-8-v0.1.docx to working-drafts in indirection-draft branch. I assume I should wait for review before submitting pull request. Regards, Bradd Kadlecik z/TPF Development Phone: 1-845-433-1573 2455 South Rd E-mail: braddk@us.ibm.com Poughkeepsie, NY 12601-5400 United States From: Mike Beckerle <mbeckerle.dfdl@gmail.com> To: Bradd Kadlecik <braddk@us.ibm.com> Cc: Steve Hanson <smh@uk.ibm.com>, DFDL-WG <dfdl-wg@ogf.org> Date: 02/18/2021 02:39 PM Subject: [EXTERNAL] Re: Contributing to github Bradd, You should get an invite to be a contributor to the repo.... This Message Is From an External Sender This message came from outside your organiza tion. Bradd, You should get an invite to be a contributor to the repo. I've added you with write access. Mike Beckerle | OGF DFDL Workgroup Co-Chair | Owl Cyber Defense | www.owlcyberdefense.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy On Thu, Feb 18, 2021 at 2:31 PM Bradd Kadlecik <braddk@us.ibm.com> wrote: Hi, I was unable to create a branch in github to upload the experience document for indirection. My userid there is tpfbraddk. Regards, Bradd Kadlecik z/TPF Development Phone: 1-845-433-1573 2455 South Rd E-mail: braddk@us.ibm.com Poughkeepsie, NY 12601-5400 United States

Sounds good. Thanks for the explanation as this is my first time with git. I'll submit the PR. Regards, Bradd Kadlecik z/TPF Development Phone: 1-845-433-1573 2455 South Rd E-mail: braddk@us.ibm.com Poughkeepsie, NY 12601-5400 United States From: Mike Beckerle <mbeckerle.dfdl@gmail.com> To: Bradd Kadlecik <braddk@us.ibm.com> Cc: DFDL-WG <dfdl-wg@ogf.org>, Steve Hanson <smh@uk.ibm.com> Date: 02/18/2021 04:51 PM Subject: [EXTERNAL] Re: Contributing to github The right workflow for git is always a discussion, but particularly... This Message Is From an External Sender This message came from outside your organiza tion. The right workflow for git is always a discussion, but particularly when dealing with binary document formats that github provides no delta support for. The PR suggests your intention to contribute the document.  I think this is a good thing to do now. At minimum it prods us with emails that there is a thing to review and that you've requested that review. A reviewer would pull your branch, check out, review the document, adding MS-word comments to it internally, then push the changes back to that same branch. At some point the PR gets approved (ie, no unresolved comments, or comments are issues we agree to keep open.) and merged, and the branch deleted. Is that an ok workflow? Mike Beckerle | OGF DFDL Workgroup Co-Chair | Owl Cyber Defense | www.owlcyberdefense.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy On Thu, Feb 18, 2021 at 2:54 PM Bradd Kadlecik <braddk@us.ibm.com> wrote: Thanks, added gwde-dfdl-experience-8-v0.1.docx to working-drafts in indirection-draft branch. I assume I should wait for review before submitting pull request. Regards, Bradd Kadlecik z/TPF Development Phone: 1-845-433-1573 2455 South Rd E-mail: braddk@us.ibm.com Poughkeepsie, NY 12601-5400 United States Inactive hide details for Mike Beckerle ---02/18/2021 02:39:28 PM---Bradd, You should get an invite to be a contributor to theMike Beckerle ---02/18/2021 02:39:28 PM---Bradd, You should get an invite to be a contributor to the repo. I've added you From: Mike Beckerle <mbeckerle.dfdl@gmail.com> To: Bradd Kadlecik <braddk@us.ibm.com> Cc: Steve Hanson <smh@uk.ibm.com>, DFDL-WG <dfdl-wg@ogf.org> Date: 02/18/2021 02:39 PM Subject: [EXTERNAL] Re: Contributing to github Bradd, You should get an invite to be a contributor to the repo.... This Message Is From an External Sender This message came from outside your organizati on. Bradd, You should get an invite to be a contributor to the repo. I've added you with write access. Mike Beckerle | OGF DFDL Workgroup Co-Chair | Owl Cyber Defense | www.owlcyberdefense.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy On Thu, Feb 18, 2021 at 2:31 PM Bradd Kadlecik <braddk@us.ibm.com> wrote: Hi, I was unable to create a branch in github to upload the experience document for indirection. My userid there is tpfbraddk. Regards, Bradd Kadlecik z/TPF Development Phone: 1-845-433-1573 2455 South Rd E-mail: braddk@us.ibm.com Poughkeepsie, NY 12601-5400 United States

I have not looked at TDML before but it does look interesting. I'm sure the z/TPF DFDL parser will likely need a way to use this in the future so that we can validate the behavior. Having an expected binary output for pointers does present a problem but the way I'd likely try to do it is by using something we've started using internally. We have tooling that runs an unparse with JSON, XML, BSON, etc as input and creates a binary file. We also can run a parse using a binary file as input to create whatever document format desired. With pointer support this didn't work of course so we made a simple routine in the parser that can create a contiguous blob that exchanges all pointer addresses for offsets. This is called before filing out the binary. When reading in the binary we can call another routine that exchanges all offsets with the pointer address. There's an internal switch to treat all pointers as offsets when either creating the infoset or when creating the data stream from it. This may also be a function users find useful to be able to file down such data and then use it again after reading it back in. In the end this isn't really validating the pointer data but the behavior between offsets and pointers should be fairly consistent. Regards, Bradd Kadlecik z/TPF Development Phone: 1-845-433-1573 2455 South Rd E-mail: braddk@us.ibm.com Poughkeepsie, NY 12601-5400 United States From: Mike Beckerle <mbeckerle.dfdl@gmail.com> To: Bradd Kadlecik <braddk@us.ibm.com> Cc: DFDL-WG <dfdl-wg@ogf.org>, Steve Hanson <smh@uk.ibm.com> Date: 03/03/2021 10:43 AM Subject: [EXTERNAL] Re: Contributing to github I merged your PR - squashed the 5 commits into one, so that the document appears to be just added. You can delete the branch if you want, or keep for future use. I was thinking about implementing this feature recently, and I am trying to come I merged your PR - squashed the 5 commits into one, so that the document appears to be just added. You can delete the branch if you want, or keep for future use. I was thinking about implementing this feature recently, and I am trying to come up with a test rig for it. I'd like to somehow adapt the TDML test language to support testing these concepts in some uniform way where we can all agree on what the results of a test should be, and exchange such tests. I think you have to be able to define multiple data "documents" in the TDML test case, and arrange for the "address" of each of them to be somehow embeddable in other ones to form a tree of pointed-to data blocks. Offsets will be easier, as you can do it all in the same single data document. I'm curious what you can share about how to test Brad. Thoughts? Mike Beckerle | OGF DFDL Workgroup Co-Chair | Owl Cyber Defense | www.owlcyberdefense.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy On Thu, Feb 18, 2021 at 5:45 PM Bradd Kadlecik <braddk@us.ibm.com> wrote: Sounds good. Thanks for the explanation as this is my first time with git. I'll submit the PR. Regards, Bradd Kadlecik z/TPF Development Phone: 2455 South Rd 1-845-433-1573 Poughkeepsie, E-mail: NY 12601-5400 braddk@us.ibm.com United States Inactive hide details for Mike Beckerle ---02/18/2021 04:51:09 PM---The right workflow for git is always a discussion, but partMike Beckerle ---02/18/2021 04:51:09 PM---The right workflow for git is always a discussion, but particularly when dealing with binary documen From: Mike Beckerle <mbeckerle.dfdl@gmail.com> To: Bradd Kadlecik <braddk@us.ibm.com> Cc: DFDL-WG <dfdl-wg@ogf.org>, Steve Hanson <smh@uk.ibm.com> Date: 02/18/2021 04:51 PM Subject: [EXTERNAL] Re: Contributing to github The right workflow for git is always a discussion, but particularly... This Mess age Is From an Exte rnal Send er This mess age came from outs ide your orga niza tion . The right workflow for git is always a discussion, but particularly when dealing with binary document formats that github provides no delta support for. The PR suggests your intention to contribute the document.  I think this is a good thing to do now. At minimum it prods us with emails that there is a thing to review and that you've requested that review. A reviewer would pull your branch, check out, review the document, adding MS-word comments to it internally, then push the changes back to that same branch. At some point the PR gets approved (ie, no unresolved comments, or comments are issues we agree to keep open.) and merged, and the branch deleted. Is that an ok workflow? Mike Beckerle | OGF DFDL Workgroup Co-Chair | Owl Cyber Defense | www.owlcyberdefense.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy On Thu, Feb 18, 2021 at 2:54 PM Bradd Kadlecik <braddk@us.ibm.com> wrote: Thanks, added gwde-dfdl-experience-8-v0.1.docx to working-drafts in indirection-draft branch. I assume I should wait for review before submitting pull request. Regards, Bradd Kadlecik z/TPF Development Phone: 2455 South Rd 1-845-433-1573 Poughkeepsie, E-mail: NY 12601-5400 braddk@us.ibm.com United States Inactive hide details for Mike Beckerle ---02/18/2021 02:39:28 PM---Bradd, You should get an invite to be a contributor to theMike Beckerle ---02/18/2021 02:39:28 PM---Bradd, You should get an invite to be a contributor to the repo. I've added you From: Mike Beckerle <mbeckerle.dfdl@gmail.com> To: Bradd Kadlecik <braddk@us.ibm.com> Cc: Steve Hanson <smh@uk.ibm.com>, DFDL-WG <dfdl-wg@ogf.org> Date: 02/18/2021 02:39 PM Subject: [EXTERNAL] Re: Contributing to github Bradd, You should get an invite to be a contributor to the repo.... This Mess age Is From an Exte rnal Send er This mess age came from outs ide your orga niza tion . Bradd, You should get an invite to be a contributor to the repo. I've added you with write access. Mike Beckerle | OGF DFDL Workgroup Co-Chair | Owl Cyber Defense | www.owlcyberdefense.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy On Thu, Feb 18, 2021 at 2:31 PM Bradd Kadlecik <braddk@us.ibm.com> wrote: Hi, I was unable to create a branch in github to upload the experience document for indirection. My userid there is tpfbraddk. Regards, Bradd Kadlecik z/TPF Development Phone: 2455 South Rd 1-845-433-1573 Poughkeepsie, E-mail: NY 12601-5400 braddk@us.ibm.com United States