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http://jira.codehaus.org/browse/JIBX-164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dennis Sosnoski closed JIBX-164.
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> Enforce proper cardinality for xsd:choice particles -- one and only one
> should be tolerated
> -------------------------------------------------------------------------------------------
>
> Key: JIBX-164
> URL: http://jira.codehaus.org/browse/JIBX-164
> Project: JiBX
> Issue Type: Improvement
> Components: Generator Tools
> Affects Versions: JiBX 1.1.4
> Environment: N/A
> Reporter: Steven E. Harris
> Assignee: Dennis Sosnoski
> Fix For: JiBX 1.2
>
>
> Per the following discussion thread on the JiBX-users list
> Tryng to bind xsd:choice -- JiBX requires each choice to be present
> http://thread.gmane.org/gmane.comp.java.jibx.users/947
> the current implementation of xsd:choice handling via the "choice=true"
> qualifier misses an important constraint on xsd:choice particles: exactly one
> of the choice values must be provided in a valid document instance. At
> present JiBX forces the mapping to note each choice value as optional
> ("usage=optional"), and in fact permits all the constituent values to be
> optional, accepting zero of them being present in an instance document as
> valid. JiBX should enforce that one and only one choice value is provided for
> each "choice=true"-qualified structure.
> While on this topic, it's confusing to the mapping author to have to specify
> "usage=optional" in addition to the "choice=true" qualifier. The optional
> implication isn't really what's intended here. We're trying to say "one and
> only one of these", not that "some or all of these are optional". Toward
> that, I suggest either introducing a "choice" element or at least dropping
> the requirement to specify "optional=true" on each of the constituent choice
> values.
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