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simple way to study hard DFDL example problem - IBM Format VS rec ords as XML
by mike.beckerle＠ascentialsoftware.com 19 Nov '04

19 Nov '04

I've come up with a way to articulate the difficulties I'm having with DFDL for complex file formats. This problem may not be that hard for someone with more XML, XPath or XQuery experience, so I'd apprecate it if you could look it over and if necessary even run it by your resident XML experts. In case the emailer mangles all the line lengths, I've also attached the below as a file.    <ITEM>The first item</ITEM> <ITEM>This is the second item</ITEM> <ITEM>The third</ITEM>  <sequence> <element name="ITEM" type="string" minOccurs="0" maxOccurs="unbounded"/> </sequence>  <BLOCK> <SEGMENT> <WHOLE/>  <DATA>The first item</DATA> </SEGMENT> </BLOCK> <BLOCK> <SEGMENT> <FIRST/>  <DATA>Thi</DATA> </SEGMENT> </BLOCK> <BLOCK> <SEGMENT> <MIDDLE/>  <DATA>s is t</DATA> </SEGMENT> </BLOCK> <BLOCK> <SEGMENT> <MIDDLE/> <DATA>he sec</DATA> </SEGMENT> </BLOCK> <BLOCK> <SEGMENT> <LAST/>  <DATA>ond item</DATA> </SEGMENT> <SEGMENT> <WHOLE/> <DATA>Third item</DATA> </SEGMENT> </BLOCK>          <complexType name="Format_VS_t"> <sequence> <element name="BLOCK" type="Block_t" minOccurs="0" maxOccurs="unbounded"/> </sequence> </complexType> <complexType name="Block_t"> <sequence> <element name="SEGMENT" type="Segment_t" minOccurs="1" maxOccurs="2"/> </sequence> </complexType> <complexType name="Segment_t"> <sequence> <choice> <element name="WHOLE"> </element> <element name="FIRST"> </element> <element name="LAST"> </element> <element name="MIDDLE"> </element> </choice> <element name="DATA" type="string"/> </sequence> </complexType>

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Re: [dfdl-wg] Agenda topics for F2F meeting
by Steve Hanson 18 Nov '04

18 Nov '04

Hi Mike I think we are in sync on this, but please can I reinforce the point that the primary aim of the F2F should be to come to an agreement between all parties on the high-level design issues? Regards, Steve Steve Hanson WebSphere Business Integration Brokers, IBM Hursley, England Internet: smh(a)uk.ibm.com Phone (+44)/(0) 1962-815848 mike.beckerle@asc entialsoftware.co m To Sent by: dfdl-wg(a)gridforum.org owner-dfdl-wg@gri cc dforum.org Subject [dfdl-wg] Agenda topics for F2F 17/11/2004 21:13 meeting Summarized from our call today. Agenda for F2F meeting: * High-level design issues - clarify what we already agree on - issue: complexity of what rep-property applies when they can be on type, scope, local, default, etc. - note: IBM suggestion: no rep annotations on simple type definitions * Transforms - how to specify them, and what their properties/parameters are. - (we need a new name different from 'transforms' I think - mikeb) - black-box external transforms - internally specified "in DFDL" transforms - everyone's dissatisfied with these examples in Jim's latest set, so far. * OMG Type Descriptor Model - review its capabilities - consider relative to prior rep-properties proposals? * Complexity Limits - review some "hard" examples where we don't have constructs yet to handle them. - do we want/need to cover these examples. That's enough agenda to fill the 2 days. We'll also allow ourselves some flexibility to re-prioritize.

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