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https://issues.apache.org/jira/browse/MNG-5864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16074580#comment-16074580
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Vsevolod Golovanov commented on MNG-5864:
-----------------------------------------
m2e bundles outdated schemas, this is reported at
https://bugs.eclipse.org/bugs/show_bug.cgi?id=513779
> "optional" attribute validation
> -------------------------------
>
> Key: MNG-5864
> URL: https://issues.apache.org/jira/browse/MNG-5864
> Project: Maven
> Issue Type: Bug
> Affects Versions: 3.3.3
> Environment: JBoss Developer Studio 8.1.0.GA
> Reporter: Vsevolod Golovanov
>
> I have some dependencies, whose {{optional}} attributes are defined by
> property expressions. E.g.:
> {code}
> <dependency>
> <!-- ... -->
> <optional>${someProperty}</optional>
> </dependency>
> {code}
> This works fine, but leads to validation errors in JBoss Developer Studio:
> {noformat}
> cvc-datatype-valid.1.2.1: '${someProperty}' is not a valid value for
> 'boolean'.
> cvc-type.3.1.3: The value '${someProperty}' of element 'optional' is not
> valid.
> {noformat}
> I far as I understand the problem is in [the
> XSD|http://maven.apache.org/xsd/maven-4.0.0.xsd]:
> {code}
> <xs:element name="optional" minOccurs="0" type="xs:boolean" default="false">
> {code}
> It's defined as boolean, yet [Maven
> Model|http://maven.apache.org/ref/3.3.3//maven-model/maven.html] says:
> {quote}Note: While the type of this field is String for technical reasons,
> the semantic type is actually Boolean.{quote}
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