[DFDL-WG] DFDL: Minutes from OGF WG call, 08 October 2008
Alan Powell
alan_powell at uk.ibm.com
Mon Oct 13 04:11:28 CDT 2008
Weekly Working Group Conference Call
13:00 GMT, 08 October 2008
Attendees
Steve Hanson (IBM)
Alan Powell (IBM)
Apologies
Mike Beckerle (Oco)
1. Decimal Supplement
Previous decimal discussions had not covered syntax for
defineTextNumberFormat and textNumberformat.
Based on defineFormat/Format pattern
defineTextNumberFormat annotation defines a named reusable number format
<dfdl:defineTextNumberFormat name=?myNumFormat?>
<dfdl:textNumberFormat decimalseparator="." />
</dfdl:defineTextNumberFormat>
Note: does not have baseFormat= as nesting not required.
textNumberFormat annotation contains the properties that define the
numberformat.
<dfdl:textNumberFormat decimalseparator="." />
textNumberFomatRef references a defineTextNumberFormat from an element
declaration.
<xs:element name="foo" type="xs:int" >
<xs:annotation><xs:appinfo source=?http://www.ogf.org/dfdl/?>
<dfdl:format representation="text"
numberFormat=?text"
textNumberFormatRef="myNumFormat"/>
</xs:appinfo></xs:annotation>
</xs:element>
and has normal short and long form
dfdl:textNumberFormatReference="myNumFormat"
<dfdl:property name=textNumberFormatRef> "myNumFormat" </dfdl:property>
Note: we decide not to follow the defineFormat/Format pattern of having
the reference on the textNumberFormat
as this wouldn't have allowed a short form and the normal form would be
verbose.
<dfdl:format representation="text"
numberFormat=?text" >
<dfdl:textNumberFormat ref="myNumFormat" />
</dfdl:format>
Possible extension:
As an extension textNumberFormat can also be in-line
<xs:element name="foo" type="xs:int" >
<xs:annotation><xs:appinfo source=?http://www.ogf.org/dfdl/?>
<dfdl:format representation="text"
numberFormat=?text" >
<dfdl:textNumberFormat
pattern='####'
decimalseparator="." />
</dfdl:format>
</xs:appinfo></xs:annotation>
</xs:element>
Scoping:
In-line numberFormats override any textNumberFormatRefernce on the element
or in scope.
The textNumberFormat is considered as a single scheme and is overriden as
a whole. Properties within
textNumberFormat cannot be overridden separately
2. packedDecimalSignCodes
packedDecimalSignCodes behaviour depends on NumberCheckPolicy but
NumberCheckPolicy is defined in textNumberFormat which isn't applicable to
binary numbers
Not resolved.
3. NumberFormat
Decided to split NumberFormat into textNumberRepresentation (text, zoned)
and binaryNumberRepresentation(binary, bcd, packed) so there is a simple
property decision tree based off representation
4. AOB
Will discuss End of Data next week
Next call 15st Oct
Meeting closed, 14:05 GMT
Actions raised at this meeting
No
Action
018
SH: Resolve packedDecimalSignCodes use of NumberCheckPolicy
019
MB: review defineTextNumberFormat as above
Current Actions:
No
Action
003
AP: Update spec from WTX document
13/8: All resolved issues have been added to spec. Remaining unresolved
items need discussion
10/9: Alan will pull out the remaining unresolved items and circulate for
discussion next week
17/9: Doc distributed and partially discussed
8/10: All issued resolved and added to spec except padding variable
length.
004
MB: Mike will also author a new section in response to comments from Sandy
Gao and Suman Kalia, explicitly connecting syntax with DFDL semantics
16/7: no progress
10/9: Mike not convinced this is necessary. Steve to talk to Sandy to see
if it is needed for any IBM implementation that extends the existing XML
parsing framework
006
SH: Distribute hidden proposal
16/7: Done. MB to review
13/8: MB to review
10/9: Mike has located this and will review
17/9: Proposal agreed
007
AP: enum + expression wording
13/8: no progress
10/9: No update
17/9: No update
011
SH: Update decimal supplement
13/8: Editorial changes needed.
10/9: Alan to incorporate into main spec
17/9: No update
8/10: added but problems with defineNumeberFormat identified and discussed
012
??: Update decimalCalendarScheme
10/9: Not allocated yet
17/9: No update
24/9: add calendar binary formats to actions
013
MB: Description and use cases for EndofData syntax
10/9: Steve didn't receive this mail, he now has and will review
014
SH: Use cases for lengthKind pattern on binary fields.
10/9: Not done
17/9: No update
015
AP: removed extended floats
10/9: No update
17/9: No update
016
AP: add hidden changes to spec
017
All: Review EndOfData changes
Actions closed at this meeting:
No
Action
033 Work items:
No
Item
001
String XML type (Ian P) - Apr 30, 2008
002
Escape schemes (Ian P) - Apr 30, 2008
003
Variables - ??, 2008 (Mike)
004
Selectors (Suman) - Apr 30, 2008
005
Improvements on property descriptions - ??, 2008 (All - split TBD)
006
Envelopes and Payloads (Steve) - Apr 30, 2008
007
(from draft 32) valueCalc (Mike) - ??, 2008 *Mostly complete*
008
(from draft 32) Property precedence for writing (Steve) - *complete but
under review*
009
(from draft 32) Variable markup (Steve) - Mar 31, 2008 *proposal needs
writing up*
010
(from draft 32) Assertions, discriminators and choice, including
discussion of timing option (Suman) - Mar 31, 2008 * in progress *
011
(from draft 32) How speculative parsing works (combining choice and
variable-occurence - currently these are separate) ??, 2008 (IBM) * in
progress *
012
(from draft 32) Reordering the properties discussion: move representation
earlier, improve flow of topics ??, 2008 (Alan) * not started *
013
(from F2F) New scoping rules
014
(from F2F) Occurs, OccurSeparator changes
015
(from F2F) choices and Output (Mike)
016
(from F2F) xpath forward references (Alan) *complete*
017
(IBM WTX review) Minor agreed updates (Alan) *complete*
018
(IBM WTX review) Review generateNewLine (Alan) *complete*
020
(IBM WTX review) Special value for zero seen eg 'zero'. (Steve)
021
(IBM WTX review) 'EndOfData' changes (Alan)
022
(IBM WTX review) Unresolvable choices - infoset changes *complete*
023
(IBM WTX review) separatorKind=?prefix? ?infix? or ?postfix? (Alan)
024
(IBM WTX review) StopValue clarification (Alan)
025
Augmented infoset and unparsing (Alan)
Alan Powell
MP 211, IBM UK Labs, Hursley, Winchester, SO21 2JN, England
Notes Id: Alan Powell/UK/IBM email: alan_powell at uk.ibm.com
Tel: +44 (0)1962 815073 Fax: +44 (0)1962 816898
Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number
741598.
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU
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