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https://issues.apache.org/jira/browse/ISIS-2146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16888818#comment-16888818
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Andi Huber commented on ISIS-2146:
----------------------------------

Makes the DomainObject's layout 'metadata' FieldSet special, that is ...

any Mixins (1-to-1-associations), that want to contribute (properties) to the 
'metadata' FieldSet
but are unbound, because such a FieldSet is not defined by the given layout, 
are hidden.

While for any other property contributing Mixin, if unbound, the property gets 
added to the FieldSet that is marked to collect all theĀ unreferenced 
properties. And there is always such a FieldSet.

> New mixins to expose the objectType and objectIdentifier as properties in the 
> "metadata" fieldset.
> --------------------------------------------------------------------------------------------------
>
>                 Key: ISIS-2146
>                 URL: https://issues.apache.org/jira/browse/ISIS-2146
>             Project: Isis
>          Issue Type: Improvement
>    Affects Versions: 1.17.0
>            Reporter: Dan Haywood
>            Assignee: Dan Haywood
>            Priority: Minor
>             Fix For: 2.0.0
>
>
> This is useful info, but it also guarantees that there will be at least two 
> properties in the "metadata" fieldset.
> This is useful for ISIS-2147.



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