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1. Sharing & Deploying
   
   1. Deploying extensions to one's own repository
      1. Simple configuration-based approach which associates a URI pattern on compliant resources with the URI of some existing backend web service, effectively acting like a reverse proxy
      2. Provide a JAX-RS class which implements an extension.
      3. Provide camel route(s) which implement an extension, or filter the representation of a resources exposed by the extension framework.
      4. Run extensions in an instance of Karaf (or cluster of karaf instances), separate from the repository
      5. Hot deploy or re-configure an extension
   2. Authoring API extensions for others to use
2. Service Discovery & Linking
   
   1. Listing URIs of services available on a given object
3. Asynchronous services or workflows
   1. Ingesting a package of objects
   2. Preparing and shipping a package of objects to some other storage (e.g. APTrust, DPN, Amazon Glacier, etc.)
4. Constraint enforcement & reporting
   
   1. Validation with respect to a model as a prerequisite to successful write operations
   2. Validation reports
5. Domain Models & APIs
   1. Complex/multi-part objects
   2. IIIF
6. Transformation & Representations
   1. Return a representation that uses information from a graph of objects
   2. SI - Return a representation that is stable regardless of changes in the underlying object or objects
   3. SI - Return a representation that is created using a model of the essential characteristics of one or a graph of objects
   4. Return an emulation of the data and behavior of an object or graph of objects
7. External access control

Requirements

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