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Scope & Objectives

The new PCDM-based Hydra architecture — the Hydra::PCDM / Hydra::Works / CurationConcerns / Sufia stack (AKA “The Gobstopper”) —  is now a year old, and needs to be evaluated in order to reach its next level of maturity. The scope of each gem and the distribution of features across this set of gems and their dependencies is a frequent topic of discussion among developers and stakeholders, and concerns around whether our stack has become too granular to maintain have also emerged: does our stack strike the right balance between architectural concerns and maintenance and other concerns, and if not, how ought it to change?


This group should be comprised of a balance of no more than ten architects, developers, and concerned managers/strategists who are using or aspire to use this application stack, who share and have opinions about these matters, and who can commit to the following deliverables and timeframe.

Deliverables & Timeframe

Deliverables will include:


The group's sunset date is currently scheduled for November 1st, 2016.

Meeting Times & Communication Channels

Meeting Notes


Note that to be a member of a Working Group, you must have have a CLA in place if you are committing code (not anticipated for SDMWG) and you must consent to release documentation under a Creative Commons Attribution-Share Alike 3.0 Unported License.


  1. Adam Wead (Penn State)

  2. Justin Coyne (Stanford )

  3. Trey Pendragon (Princeton)

  4. Jeremy Friesen (Notre Dame)

  5. Esmé Cowles (Princeton)

  6. Lynette Rayle (Cornell)

  7. Ben Armintor (Columbia)

  8. Carrick Rogers (Indiana)

  9. Michael Klein (Northwestern)


Legacy documents from the spring and summer 2015 work. Note that contradictory decisions may have been made since these documents were last used. They may still prove as useful reference points, e.g. for enumeration of features.