DPLA Hydra Contributions

Hydra Metadata & PCDM

We were active throughout the initial development of PCDM, both at meetings in Portland and on mailing lists. Tom Johnson is a current PCDM committer.

Mark Matienzo is active in Hydra Metadata Working Groups.

Fedora

We are participating in discussions surrounding specification of a Fedora API.

Recent

• Fedora Versioning API spec draft: http://fedora.info/spec/2016/05/20/resource-versioning

ActiveTriples

Tom Johnson is the primary maintainer of the ActiveTriples project, which provides RDF modeling interfaces for Hydra.

Recent 

• Released 0.9.0 
  • Upgraded to RDF.rb 2.0.
  • Misc. minor improvements
• Released 0.10.0
  • Major performance improvements
  • Compatibility fixes for ActiveFedora
  • This is largely in support of Trey Pendragon's ActiveFedora performance work and ActiveFedora 11
• Participating in Hydra Triplestore Interest Group

Upcoming

• More performance updates are in the pipeline
  • https://github.com/ActiveTriples/ActiveTriples/pull/219
• Work continues toward 1.0
  • see, e.g. https://github.com/ActiveTriples/ActiveTriples/tree/feature/tx-parent

RDF.rb

Tom Johnson is a member of the core team for RDF.rb

Recent  

• 2.0 Released!
  • ActiveFedora will use this as of 11.0.0
  • Release notes at https://github.com/ruby-rdf/rdf/releases/tag/2.0.0
  • Some concurrency info is discussed at: http://no-reply.github.io/notes/2016-06-04-concurrency-in-rdf-rb.html
• Maintenance updates for Ruby 2.3 support
  • See RDF.rb 2.0.2 release notes: https://github.com/ruby-rdf/rdf/releases/tag/2.0.2

Upcoming  

• Benchmarking
• Improving external repository support