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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » How to define Unordered List in DFDL

How to define Unordered List in DFDL

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mbmqusr

Posted: Wed Jul 03, 2013 10:38 am Post subject: How to define Unordered List in DFDL

Newbie

Joined: 02 Jul 2013
Posts: 9

Hi
I want to understand if we can define XML schemas to use an unordered list having elements with multiple occurences in Message Broker 8.0.0.2

I am of the impression that Broker only supports XML 1.0, and hence an unordered list will have only elements having occurences 0 to 1, not more.

Can you please throw some light on this topic?

Thank You

lancelotlinc

Posted: Wed Jul 03, 2013 11:03 am Post subject:

Jedi Knight

Joined: 22 Mar 2010
Posts: 4941
Location: Bloomington, IL USA

IBM WMB DFDL supports V1 of the DFDL spec, which supports both 1.0 and 1.1 of the XML spec.

https://publib.boulder.ibm.com/infocenter/wmbhelp/v8r0m0/topic/com.ibm.dfdl.spec.doc/dfdl_30.html

Explicit declaration for unordered sets is here:

http://publib.boulder.ibm.com/infocenter/wmbhelp/v8r0m0/topic/com.ibm.etools.mft.doc/ad10591_.htm

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kimbert

Posted: Wed Jul 03, 2013 11:57 am Post subject:

Jedi Council

Joined: 29 Jul 2003
Posts: 5542
Location: Southampton

The DFDL specification does not use XSD 'all' groups to model unordered data. DFDL models unordered data using a sequence group with dfdl:sequenceKind='unorderd'. Members of an unordered sequence group are not restricted to maxOccurs=1. This was a deliberate decision by the DFDL working group - we specifically wanted to avoid that restriction.

IBM DFDL ( as used in WMB v8.0.0.2 and IIb v9 ) does not yet support unordered groups. IBM are aware of the requirement, and it is something that we would like to add to the IBM implementation at some point in the future.

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