- dfdl-wg - lists.ogf.org

clarification - dfdl:choiceDispatchKey does not specify forward-reference restrictions
by Mike Beckerle 30 Aug '17

30 Aug '17

The test expressions in dfdl:assert and discriminator both specify that they may refer to the value of this element or its descendents. Hence, a test can refer to complex content down and inside the element. Most other properties can refer only backward, and not to the value of the element on which they appear (as their values are likely needed in order to parse that data and get an element at all.) However for dfdl:choiceDispatchKey, there is no description of what the expression may refer to. There is a common use case for choices which is where the fields(s) that the choiceDispatchKey wants to inquire about are found at a fixed position inside each of the choice branches. Programming languages use offsets to reach forward into the data to retrieve these. The only way this can be expressed in DFDL, without running into problems with polymorphic path steps, requires such elements to appear as children of a sequence that is the root of each branch. So for example: <element name="msg"> <complexType> <choice dfdl:choiceDispatchKey="{ ../msg/key }"> <sequence dfdl:choiceBranchKey="1"> ... stuff ... <element name="key" ..../> ... more stuff... </sequence> <sequence dfdl:choiceBranchKey="3"> ... stuff ... <element name="key" ..../> ... more stuff... </sequence> .... and so on ... </choice> </complexType> </element> This uses paths that reach down into the inside of each branch to obtain the key element. So is this legal, or not? Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.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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Cancelled: OGF DFDL Working Group call
by Steve Hanson 18 Aug '17

18 Aug '17

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clarification question on terminators vs. enclosing group separators/terminators
by Mike Beckerle 17 Aug '17

17 Aug '17

The DFDL Spec says: 12.3.2 dfdl:lengthKind 'delimited' On parsing, the length of an element with dfdl:lengthKind 'delimited' is determined by scanning the datastream for the delimiter. The data stream is scanned for any of · the element's terminator (if specified) · an enclosing construct's separator or terminator · the end of an enclosing element designated by its known length · the end of the data stream So if an element has a terminator, are the enclosing constructs' separator or terminator also relevant? Or is ONLY the element's own terminator relevant for scanning, and hence, only the element's own terminator must be escaped if it appears in the content. For example, in a space-separated group, an enclosed element has a terminator ";". When parsing that element, do spaces have to be escaped if they appear in the content, or does only the terminator ";" have to be escaped? Strictly speaking it seems enclosing delimiters shouldn't have to be escaped, because the data must have the ";", and spaces are only significant as separators after finding the ";" terminator. Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.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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OGF DFDL WG Call 2017-08-08 - cancelled
by Steve Hanson 09 Aug '17

09 Aug '17

Steve not available at short notice so cancelling. Apologies. Regards Steve Hanson Architect, IBM DFDL Co-Chair, OGF DFDL Working Group Hursley, UK smh(a)uk.ibm.com tel:+44-1962-815848

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Cancelled: OGF DFDL Working Group call
by Steve Hanson 08 Aug '17

08 Aug '17

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OGF DFDL WG Call Minutes 2017-07-25
by Steve Hanson 26 Jul '17

26 Jul '17

Please find minutes from the above call at https://redmine.ogf.org/dmsf_files/13562?download= Next call Aug 8th @Michele - any update on action 287 ? Regards Steve Hanson IBM Hybrid Integration Architect, IBM DFDL, Co-Chair, OGF DFDL Working Group smh(a)uk.ibm.com tel:+44-1962-815848 mob:+44-7717-378890

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Announcement: Daffodil 2.0.0 Release Candidate 3
by Steve Lawrence 25 Jul '17

25 Jul '17

We are pleased to announce the third release candidate of Daffodil 2.0.0! Notable changes since the second release candidate include: - New API with support for JDOM, w3c DOM, Scala XML, XML text, and json - Support for xs:choice direct dispatch - Support for xs:boolean types - Support for 3-, 4-, 5-, and 6-bit encoders - Support for xs:hexBinary with bit lengths - Support for xs:ignoreCase="yes" - Support for xs:union restrictions - Improvements to the DFDL expression language, including fixes for div/idiv, type conversions and literal constants, bugs in daf:trace(), dfdl:valueLength() and dfdl:contentLength(), and support for fn:error() and math:pow() functions - Numerous bug fixes and performance improvements The release candidate has been tagged as 2.0.0-rc3 in the git repo: https://opensource.ncsa.illinois.edu/bitbucket/projects/DFDL/repos/daffodil… The release is also available for downloaded from the Daffodil Artifacts page: https://opensource.ncsa.illinois.edu/projects/artifacts.php?key=DFDL&versio… Please test the release candidate and let us know if you find any issues. To report bugs or ask any questions, the development team is available on the Daffodil users mailing list: http://oss.tresys.com/mailman/listinfo/daffodil-users as well as XMPP HipChat: http://hipchat.ncsa.illinois.edu/gvZdmJHmq or via the JIRA Daffodil bug tracker: https://opensource.ncsa.illinois.edu/jira/projects/DFDL/summary Thanks! The Daffodil Team

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OGF DFDL WG Call Agenda 2017-07-25
by Steve Hanson 25 Jul '17

25 Jul '17

Please find agenda for call on Redmine at https://redmine.ogf.org/dmsf_files/13562?download= Regards Steve Hanson IBM Hybrid Integration Architect, IBM DFDL Co-Chair, OGF DFDL Working Group smh(a)uk.ibm.com tel:+44-1962-815848 mob:+44-7717-378890

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OGF DFDL Working Group call
by Steve Hanson 25 Jul '17

25 Jul '17

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OGF DFDL WG Call 2017-07-11 - cancelled
by Steve Hanson 24 Jul '17

24 Jul '17

Steve not available at short notice so cancelling. Apologies. Regards Steve Hanson Architect, IBM DFDL Co-Chair, OGF DFDL Working Group Hursley, UK smh(a)uk.ibm.com tel:+44-1962-815848

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