2004 August 20

ES3 architecture notes

• client layers
  • top: reflection
    • program namespace passed to
      • create_metadata
      • create_lineage
    • template gives mapping between program and ES3 namespace
    • works in
      • Python
      • sh
    • but how about
      • IDL?
      • MATLAB?
  • middle: object
    • 1:1 metadata/lineage object : program object
    • metadata object e.g.
      • m1 = metadata('... type of object ...')
        m1.field = value
        ...
        m1.record()
    • lineage object e.g.
      • L1 = lineage(m1, m2, '... type of lineage ...')
        L1.record()
    • unique obj.id assigned locally on creation
      • e.g. GUID
  • bottom: XML
    • build document
    • submit to server
• server side (assume servlets)
  • "listeners" (ick: need better name...)
    • wait for client XML post
    • insert into XML DB
  • lineage builder
    • walk lineage graph
    • return RDF doc
      • e.g. for submission to graph drawer
  • collection builder
    • snarf XML metadata
      • according to ADL collection description (template?)
    • build ADL indices

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• Meetings last edited on 6 February 2008 at 11:03 am by 128.111.110.147