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http://jira.nuxeo.org/browse/NXP-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=36218#action_36218
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jhon book commented on NXP-1653:
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> Simple list types are incorrectly handled
> -----------------------------------------
>
> Key: NXP-1653
> URL: http://jira.nuxeo.org/browse/NXP-1653
> Project: Nuxeo Enterprise Platform
> Issue Type: Bug
> Components: Core
> Affects Versions: 5.1.1
> Reporter: Bogdan Stefanescu
> Assignee: Bogdan Stefanescu
> Priority: Critical
> Fix For: 5.1.3
>
>
> Lists can be specified in two flavors using XSD:
> 1. using xs:list
> <xs:simpleType name="keywords">
> <xs:list itemType="xs:string" />
> </xs:simpleType>
> 2. Using xs:sequence
> <xs:complexType name="keywords">
> <xs:sequence>
> <xs:element name="item" type="xs:string" minOccurs="0"
> maxOccurs="unbounded"/>
> </xs:sequence>
> </xs:complexType>
> The difference between the two is somewhat similar between arrays and lists:
>
> Elements of type xs:list are written in an xml document as follow:
> <keywords>nuxeo ecm seam runtime nx core</keywords>
> while the elements that correspond to the complextype declaration are written
> as follows:
> <keywords>
> <item>nuxeo</item>
> <item>ecm</item>
> <item>seam</item>
> <item>runtime</item>
> <item>nx</item>
> <item>core</item>
> </keywords>
> So the first format (xs:list) is better represented as a java array since it
> can be seen as scalar type while the second
> one is better represented as a java list since it is a composite type.
> -------------------
> The problem in Nuxeo is that nuxeo schema treats as scalar list (arrays) any
> list that have a scalar item type - which is wrong.
> We can see that both examples above are list of scalar types but are very
> different one of each other.
> So in nuxeo schema the second list is also treated as an array which is not
> normal.
> The new property model on which I am working can fix this but it will have
> impact on existing code - we need to check where scalar lists are used and
> replace arrays with lists if the XSD declaration is made as a complexType.
> This will impact dublincore schema - which I think is simpler to fix but also
> client schemas (like GIEDE schemas)
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