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Eco Grid Conference Call Notes 17 Sep 2004

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Participants

Jones, Spears, Tao, Servilla, Rajasekar, Zhu

Agenda

This is a continuation of the previous agenda.

  1. Certificates and authentication
  2. EcoGrid query semantics
    • handling EML version changes (2.0.0 vs. 2.0.1)
    • translating EML and Darwin Core metadata queries
  3. Update on data query/subset functionality (Tao and Spears)
  4. Update on put interface implementation (Zhu)
    • Review the 'put' interface via its WSDL
    • Review the 'Authentication' interface via its WSDL

Notes

  1. Skipping certificates agenda item because brunt and murillo absent -- will reschedule
  2. Ecogrid query semantics
    • need ontology mapping between standards
    • can Sparrow provide the necessary reasoning services?
    • probably need to translate metadata instances as well as classes, so may need to populate the reasoner with al of the instance data (e.g., load EML into the reasoner)
    • can existing query rewriting systems work? maybe...but probably would need to be customized or extended
      • need to discuss with Bertram and Shawn, especially with regards to Sparrow -- this is probably part of SMS layer, but how to deal with instance data (e.g., EML values)
    • probably start with just crosswalks, then add instance data later
    • implement this as an 'ontology server'
      • e.g., takes an EML query in, gives a Darwin Core query back
    • Shawn: says we should map to an integrated schema to avoin n^n mappings
      • e.g., in ant example paper they map to the ontology
  3. Update on data query/subset functionality (Tao and Spears)
    • Rod gave an overview of the use of EML Data Source and cached queries
    • Matt: can we use the existing Kepler-side infrastructure to implement EcoGrid-side data query by loading the EML-described sources into a relational db
    • Jing: still need the DarwinCore Data source
  4. Update on put interface implementation (Zhu)
    • Bing gave overview of put implementation
      • Noted that Metacat identifies metadata and data separately while SRB uses same id for both
      • Client works, can use to upload
      • Still need to know which system you are using so you use the API correctly
        • Bing says this can be fixed on the client side

Action items

  1. Matt will contact Bertram and Shawn about query translation needs, involve other EcoGrid folks
    • reread Shawn's 'ant' paper for ideas
  2. Rod will describe (in a bug) and implement a DarwinCore data source
  3. Jing will describe and implement a new multi-node EcoGrid search for Kepler (with resultset integration)


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This particular version was published on 17-Sep-2004 12:38:24 PDT by NCEAS.jones.