[jira] [Closed] (DAFFODIL-2380) Perfect Round Trip capability

["Steve Lawrence (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DAFFODIL-2380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Lawrence closed DAFFODIL-2380.
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> Perfect Round Trip capability
> -----------------------------
>
>                 Key: DAFFODIL-2380
>                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2380
>             Project: Daffodil
>          Issue Type: New Feature
>          Components: Back End
>    Affects Versions: 2.7.0
>            Reporter: Mike Beckerle
>            Priority: Minor
>
> Some users have the hope that Daffodil will perfectly-round-trip data. 
> That means that a parse, validate, unparse of data will perfectly reproduce data, not canonicalize it thereby requiring recomputation of checksums, signatures, etc. which we (Daffodil) can't do yet automatically. 
> Can daffodil keep track of the specific delimiters used, and other things that would otherwise be cannonicalized. This would not be DFDL-spec compliant, which requires that on unparse, the first of several alternative delimiters be used.  Nevertheless a mode where delimiters were captured into some sort of pseudo-element so that they would be used for unparsing would be helpful for some network-security applications.
> There are other tickets for abilities to recompute checksums, by enhancing the Daffodil layering extension of DFDL. This would be a different solution to that sort of problem. 



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