It's a validation issue. I have a packed decimal number with ranges 0-100, 200-300, 400-500. I can't parse and validate this with DFDL. WTX can handle this today.

Regards

Steve Hanson
Programming Model Architect
WebSphere Message Brokers
Hursley, UK
Internet: smh@uk.ibm.com
Phone (+44)/(0) 1962-815848


DFDL <mbeckerle.dfdl@gmail.com>

07/03/2009 04:49

To
Steve Hanson/UK/IBM@IBMGB
cc
"dfdl-wg@ogf.org" <dfdl-wg@ogf.org>
Subject
Re: [DFDL-WG] Numbers with multiple ranges





What does this have to do with representation/ format ?

Seems totally out of scope to me.

...mikeb


On Mar 6, 2009, at 12:18 PM, Steve Hanson <smh@uk.ibm.com> wrote:

One of the existing non-XML parsers from IBM is capable of modelling an integer or decimal with non-contiguous ranges, eg, 0-100, 200-300, 400-500.  It is also possible to model this using XML Schema, using a user-defined simple type which is a union of simple type restrictions.

However it is not possible to model this in DFDL because unions are not supported. A choice could be used, but that would give different named elements in the resultant infoset depending on the value, which is not ideal.

I believe this is use case that we should consider for DFDL 1.0.  We could decide to allow unions, but with a constraint that the members of the union had to be restrictions of the same built-in type, and that clashing DFDL properties on the members was an error. I believe the existing scoping rules for visiting types would still apply ok. No annotation appears on the xs:union only on the xs:simpleType as currently. The net effect is that our parsing rules are the same as currently, but we gain validation capability.

I am not in favour of more widespread support for unions. I don't have a compelling use case for union of different logical types, eg, xs:dateTime and xs:string.

Your thoughts are welcome.

 !-- integer range 0 - 100
 <xsd:simpleType name="intRange1">
   <xsd:restriction base="xsd:int">
     <xsd:maxInclusive value="100"/>
     <xsd:minInclusive value="0"/>
   </xsd:restriction>
 </xsd:simpleType>

 !-- integer range 200 - 300
 <xsd:simpleType name="intRange2">
   <xsd:restriction base="xsd:int">
     <xsd:maxInclusive value="300"/>
     <xsd:minInclusive value="200"/>
   </xsd:restriction>
 </xsd:simpleType>

 !-- integer range 400-500
 <xsd:simpleType name="intRange3">
   <xsd:restriction base="xsd:int">
     <xsd:maxInclusive value="500"/>
     <xsd:minInclusive value="400"/>
   </xsd:restriction>
 </xsd:simpleType>

 !-- Union of above types
 <xsd:simpleType name="intRange">
   <xsd:union memberTypes="intRange1 intRange2 intRange3"/>
 </xsd:simpleType>

 !-- Union of anonymous types being restrictions of above types
 <xsd:simpleType name="intRangeLocal">
   <xsd:union>
     <xsd:simpleType>
       <xsd:restriction base="intRange1"/>
     </xsd:simpleType>
     <xsd:simpleType>
       <xsd:restriction base="intRange2"/>
     </xsd:simpleType>
     <xsd:simpleType>
       <xsd:restriction base="intRange3"/>
     </xsd:simpleType>
   </xsd:union>
 </xsd:simpleType>

 !-- Union of anonymous types being local restrictions
 <xsd:simpleType name="intRangeLocalRestrictions">
   <xsd:union>
     <xsd:simpleType>
       <xsd:restriction base="xsd:int">
         <xsd:minInclusive value="0"/>
         <xsd:maxInclusive value="100"/>
       </xsd:restriction>
     </xsd:simpleType>
     <xsd:simpleType>
       <xsd:restriction base="xsd:int">
         <xsd:minInclusive value="200"/>
         <xsd:maxInclusive value="300"/>
       </xsd:restriction>
     </xsd:simpleType>
     <xsd:simpleType>
       <xsd:restriction base="xsd:int">
         <xsd:minInclusive value="400"/>
         <xsd:maxInclusive value="500"/>
       </xsd:restriction>
     </xsd:simpleType>
   </xsd:union>
 </xsd:simpleType>

Regards

Steve Hanson
Programming Model Architect
WebSphere Message Brokers
Hursley, UK
Internet: smh@uk.ibm.com
Phone (+44)/(0) 1962-815848

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Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU





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Unless stated otherwise above:
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Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU