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Scope & Objectives

Based on the Hydra Connect 2016 meeting, scope and objectives are being reconsidered. See notes from this meeting and sign up if you are interested!

This group is interested in working together on base metadata recommendations, as a possible next step of the successful community data modeling, Portland Common Data Model. 

The larger goals of the Metadata Interest Group are to:
  • Identify models that may help Hydra newcomers
  • Further interoperability among Hydra projects

The scope of this group concentrates primarily on using Fedora 4.
The group is ambitiously interested in best practices and help with technical, structural, descriptive, and rights metadata, as well as LDP implementation issues.
This working group is not creating a new standard or implying any metadata constraints for Hydra projects.

Metadata IG Requests and Priorities

Sunset milestone: No meeting occurs for 6 months (at that point there will clearly be no interest in this interest group).


Membership is open to anyone. If you want to be listed as a member, please add your name to the list below. Members agree that by participating all documents produced as part of the working group will be released under a Creative Commons Attribution-Share Alike 4.0 Unported License

Meeting Times & Communication Channels

Updates to Community

Updates and announcements will be sent to hydra-communityhydra-tech, hydra-metadataislandora, and fedora-community lists.

Metadata IG

Time: Last Tuesday of every month, 3-4pm Eastern.  Call duration: 1 hour

Call-In Info: +1 (641) 715 3660, access code 651025 

Subgroups may have additional working meeting calls. Outcomes and questions will be discussed at the Metadata Interest Group meeting calls and then updates sent to the lists.

Applied Linked Data Working Group

Time: Thursdays at 9 am (PDT). Every two weeks starting 2015/05/14.

Call-In Info: Google Hangout:

URI Selection Working Group (Page)

Time: First meeting Friday, April 14 (9am PDT)

Call-In Info: +1 (641) 715 3660, access code 651025

URI Management Working Group

**Work Completed***

Descriptive Metadata Working Group

Time: started 2015/05/13, currently on pause; MODS and RDF Descriptive Metadata Subgroup still active


Rights Metadata Working Group

**Work Completed***

Subgroup may be reconvened if additional rights metadata questions come to the Metadata WG.

Segment of a File Structural Metadata Working Group

***Work Completed***

Subgroup may be reconvened if additional outcomes are required from the Metadata WG.

Technical Metadata Working Group

**Work Completed*** 

Subgroup may be reconvened if additional outcomes are required from the Metadata WG.

Working Groups - Draft Deliverables & Timeframe

First phase deliverables are marked for concurrent work. See specific working group pages for timelines.  Phase 1 completed by Sufia PCDM May sprint (2015). Phase 2 completed by Hydra Connect 2015. A full report will be given at HydraConnect 2015. 

Phase 1 is complete. Currently working on Phase 2 for Descriptive Metadata, Applied Linked Data, and URI Management. A report was given at HydraConnect 2016.

  • Technical Metadata - Phase 1, Facilitators: Aaron Coburn & Nick Ruest - Work Completed
  • Segment of a File Structural Metadata - Phase 2,  Facilitator: Julie Hardesty - Work Completed
  • Rights Metadata - Phase 1-2, Facilitator: Esmé Cowles - Work Completed
  • Descriptive Metadata
    • Collect User Stories - Phase 2, Facilitator: Carolyn Hansen, work to follow spring 2015 sprint on implementing PCDM
    • Best practices on handling blank nodes and nested attributes - see also Fedora-tech discussions
    • Best practices on using multiple schemas/vocabularies
    • Base descriptive metadata application profile with mappings to Shared Data Model and community standards such as Dublin Core and/or DPLA Metadata Application Profile
    • How to handle MODS XML in RDF environment - Phase 3, July 2015- October 2015, Facilitator: Steven Anderson
  • Applied Linked Data - Phase 1-2, Facilitator: Steven Anderson
    • Best Practice Guide for:
      • Caching
      • Indexing in SOLR
    • Collaborative Experiments in technological solutions (e.g. Implementing Linked Data Fragments)
  • URI Management - Phase 2, Facilitator: Julie Hardesty
    • Survey Hydra community re: predicate/property problems
    • Decision tree for new predicates/vocabs
    • Functional requirements for Hydra vocab manager
    • Workflow for requesting new predicates/vocabs from Hydra vocab manager 


Additional Resources may be available on working group pages:

Meeting Notes

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  1. is the meeting at 9am (per Metadata Call 2015-04-22) or at 10am? 

    1. 10 am. I'm mixing up my Hydra meetings. Changing ASAP.