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https://issues.apache.org/jira/browse/AMBARI-15636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15269922#comment-15269922
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Matt commented on AMBARI-15636:
-------------------------------

Thanks [[email protected]]

> Use a new concept called a Version Definition File (VDF) to support 
> installation
> --------------------------------------------------------------------------------
>
>                 Key: AMBARI-15636
>                 URL: https://issues.apache.org/jira/browse/AMBARI-15636
>             Project: Ambari
>          Issue Type: Epic
>          Components: ambari-server
>            Reporter: Nate Cole
>            Assignee: Nate Cole
>            Priority: Critical
>             Fix For: 2.4.0
>
>
> Use a new concept to install and add repositories:  The Version Definition 
> File (VDF).  The VDF is used to explicitly state what is available in a 
> release/repository.
> It is desirable to know exactly what is being installed using Ambari.  The 
> amount of repository management systems (yum/rpm, zypper/rpm, apt-get etc) 
> make it infeasible to allow Ambari to know what is in them.  It is up to 
> distributions to provide information regarding a release in a friendly manner.
> VDF processing includes defining the release, versions that are available.  
> This file is to be written in XML and validated using XSD.



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