[OASIS Issue Tracker] Commented: (CMIS-713) Add secondary objecttypes

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    [ http://tools.oasis-open.org/issues/browse/CMIS-713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=24992#action_24992 ] 

Alexander Haag commented on CMIS-713:
-------------------------------------

A little understanding problem for client developers, I have.
I understand that the client can provide an ID to a Mixin and "add properties" (they will be refreneced) to a type definition.

1. Attaching a Mixin from client, do we use here the ID of Mixin type or is it an instance of the mixin?
2. Can a Mixin contain every property type defined by CMIS? 
2.1. What if a Mixin contains a "required" property?

Even the CMIS repository could add new Mixin to recent created document, dependent on its content (example from document exif files).

Another case is that on the server a default combination of Mixin and type exist.
3. How is that information provided to the client?
4. Or is this case not supported/ invalid through the CMIS services?

> Add secondary object types
> --------------------------
>
>                 Key: CMIS-713
>                 URL: http://tools.oasis-open.org/issues/browse/CMIS-713
>             Project: OASIS Content Management Interoperability Services (CMIS) TC
>          Issue Type: New Feature
>          Components: Domain Model
>            Reporter: Florian Mueller
>             Fix For: V1.1
>
>
> We have discussed secondary types/mix-ins/aspects/categories/... for CMIS 1.0 and dismissed them to get the specification out of the door.
> We should take the discussion up again for CMIS 1.1. It would open the door for more applications and simplify others. If I remember correctly, many repositories have native support for secondary types anyway.
> See this document for a more detailed proposal: http://www.oasis-open.org/apps/org/workgroup/cmis/download.php/41368/SecondaryTypesProposal.docx

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