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Kinds of system metadata:

Artifacts

TBD

Applications

• Artifact name

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Up until 3.2, users could not associate metadata with stream views. We will need to add this capability in 3.2. However, there would not be any parent-child relationship between a view, and its stream, as far as metadata is concerned. A view will be a separate entity from its stream, and will show up separately in search results. Metadata of a stream will not be automatically available as metadata of a view. 

Upgrade

The BusinessMetadataDataset dataset type introduced in 3.2 will be renamed to MetadataDataset, since it will also serve system metadata in 3.3. For existing CDAP installations, we will need an upgrade step to change the type of the existing "business.metadata" dataset in the "datasets.instance" table. 

REST APIs

The Metadata REST APIs to retrieve properties and tags will be updated to accept a scope query parameter. It will support the values user and system. If scope is not specified, the API will return all metadata across both scopes. 

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