Attendees:

Steven Anderson (Boston Public Library)
Trey Terrell (Oregon State University)
Tom Johnson (DPLA)
Arwen Hutt (UC San Diego)
Aaron Coburn (Amherst College)
James Van Mil (University of Cincinnati)
Corey Harper (New York University)

Regrets:

Mark Matienzo (DPLA)

Linked Data Fragments Sprint Scope + Planning Discussion.

Search Fragments draft: https://stackedit.io/viewer#!provider=gist&gistId=a226bd32fdc9da86ea55&filename=searchFragment.md
Spinning up something that speaks Hydra Ontologies.
- Start with "Give me a subject, I'll give you triples"
  - This is a sub-type of Triple Pattern Fragments where _subject_ is in the request: { subject ?p ?o . }
- Works against remote triple store (ie id.loc, getty, etc)
Deliverables:
- A Hydra Ontology endpoint that caches resources from remote dataset and returns: { <subject> ?predicate ?object . }
  - Q: How does this fit in with QA?
- Question on when something isn't cached, does it indicate it will be available and then try to cache it? Or block until it is fetched to be cached?
- Configure some time of cache time limit on a result. Reply with when it was cached as well?
  - Mention of Varnish?
    - But want to design something that is independent of any caching implementation.
- Question about blocking. If not cached yet, block until cached, or say not cached come back later?
  - Not blocking, redirecting could be interesting for asynchronous use cases
    - Ticket 1: Blocking support first.
- Desire to add Linked Data Fragments stuff to rdf.rb where possible (core set of rdf libraries for ruby - http://ruby-rdf.github.io/).
  - Do this work in ActiveTriples namespace.
  - Unlicense (http://unlicense.org/) license under the ActiveTriples github to avoid CLA and other license issues.
- Start of Sprint is June 8th.
  - For those at Open Repositories (Steven, James, Aaron, and Mark), start an email chain to work out schedules.

Broader / Narrower SKOS concepts in an application.

Given "Sports", get narrower like "Baseball". Given "Baseball", get the broader of "Sports". All in the same response.
- How to weight this?
- Will it be confusing to the user? If they search for "Sports", they may really want books just about "Sports".
- Seems that Broader likely doesn't have a good use case. Like "North America" giving you "Earth" isn't useful.
Trey is going to experiment with implementing this over the next week or two.
- Report back on how that went on the next call. No user testing really but can talk about the implentation experience.

Continued "Sidecar triplestore" best practice / implementation discussion.

Fedora Replication System ( https://github.com/fcrepo4-labs/fcrepo-camel-toolbox/tree/master/fcrepo-indexing-triplestore ) from fcrepo-camel-toolbox suggested over the polling.
- But believe this is only limited to when a Fedora object changes rather than the case of just a label being out of date normally.
Abstracting out idea of an "event stream"
- Tells system to "reach past the cache"
Need to support HEAD requests on Linked Data Fragments (use case of "update the cache but I don't care what you return").

Next Meeting:

Due to Open Repositories, the next meeting will be June 25th at 9:00 AM PST.

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