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This release is 4.3.0 instead of 4.2.1 because there are two non-backwards compatible changes:
An update utility has been included with the release - run the utility to migrate the properties to their new namespaces and update the package names. |
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Fedora is moving towards a tightly defined, standards-based, set of RESTful services that are supplemented with a pattern of integrating message-driven, asynchronous services for non-core capabilities. The 4.3.0 release includes several updates that move the software in that direction.
- Aligning with LDP by
- Returning a 400 response when illegal triples are not persisted
- Advertising constraints in responses when an update request fails due to a repository constraint
- Showing inbound references for indirectly contained resources
- Tightening the core repository services by
- Forbidding the update of resources that are not the target of the request
- Removing the leakage of the underlying UUID to repository clients
- Allowing "mimeType" and "filename" properties to be mutable
- Moving towards full OSGi deployability for runtime configuration and feature activation
- Ensuring modules are property packaged as OSGi bundles
- Ensuring modules are importing and exporting correct dependencies and services
- Creating a Fedora features.xml for dependable deployment into Apache Karaf
- Enhancing external services with the Apache Camel integration framework by
- Adding a "reindex" endpoint
- Adding a "fixity" invocation service
- Adding support to the REST API for the JSON-LD "Accept" header "profile" parameter
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A primary focus of the ongoing Fedora effort is to facilitate the upgrade/migration of Fedora3 repositories to Fedora4. To those ends, a number of improvements have been incorporated into the "migration-utils" upgration utility.
- Packaging the utility as a standalone executable application
- Using opaque identifiers for migrated resources
- Adding support for user-provided RDF namespace mappings
- Providing specific mappings of Fedora3 to Fedora4 properties
- Improving support for migrating resources with non-existent datastreams
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After the completion of the Audit Service sprints this spring, there remained two items to be completed:
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One of the primary goals of Fedora is to participate as a first-class member in the world of linked data. Two updates are included in the 4.3.0 release related to that goal:
- Cleaning the Fedora ontology by removing the obsolete "fedora:Blanknode" class
- Creating a JSON-LD @context file for the Portland Common Data Model ontology
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Fedora Java Client
The Fedora Java Client library was updated for this release by
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