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Icoper webinar

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Icoper webinar Icoper webinar Presentation Transcript

    • Strategies for Aggregating
    • Educational Content
    Bram Vandeputte & Joris Klerkx http://bit.ly/c6mRZC http://bit.ly/bram-vandeputte
  • Key Technologies
    • Metadata (IEEE LTSC LOM)
      • describe learning resources with ICOPER AP
    • Harvesting (OAI-PMH)
      • get learning resource metadata and copy locally
    • Federated Search (SQI)
      • distribute issued queries to remote repositories
    • Publishing (SPI)
      • add new learning resources in ‘a’ repository
  • Metadata & Educational Content IEEE LTSC LOM Example taken from: http://www.dlib.org/dlib/january08/ceri/01ceri.html
  • Harvesting with OAI-PMH
  • How OAI-PMH works
    • OAI “VERBS”
      • Identify
      • ListMetadataFormats
      • GetRecord
      • ListIdentifiers
      • ListRecords
      • ListSets
    Service Provider Metadata Provider HTTP Request HTTP Response (OAI Verb) (Valid XML) H A R V E S T E R R E P O S I T O R Y OAI OAI
  • Example verb: ListRecords
    • Purpose
      • Retrieves metadata records for multiple items
    • Parameters
      • from – start date (O)
        • greater than or equal to
      • until – end date (O)
        • less than or equal to
      • set – set to harvest from (O)
      • resumptionToken – flow control mechanism (X)
      • metadataPrefix – metadata format (R)
  • Example verb: GetRecord
    • Purpose
      • Returns the metadata for a single item in the form of an OAI record
    • Parameters
      • identifier – unique id for item (R)
      • metadataPrefix – metadata format for the record (R)
  • Example OAI-PMH Calls
      • Identify
        • http://ariadne.cs.kuleuven.be/ariadne-partners/services/oai?verb= Identify
      • ListMetadataFormats
        • http://ariadne.cs.kuleuven.be/ariadne-partners/services/oai?verb=ListMetadataFormats
      • ListRecords
        • http://ariadne.cs.kuleuven.be/ariadne-partners/services/oai?verb=ListRecords&metadataPrefix=oai_lom
        • http://ariadne.cs.kuleuven.be/ariadne-partners/services/oai?verb=ListRecords&resumptionToken=
      • GetRecord
        • http://ariadne.cs.kuleuven.be/ariadne-partners/services/oai?verb=GetRecord &identifier=oai:ariadne.cs.kuleuven.be:BLKLKP1382&metadataPrefix=oai_lom
      • ...
  • Example : http://ariadne.cs.kuleuven.be/ariadne-partners/services/oai?verb=ListRecords&metadataPrefix=oai_lom
  • Setting up OAI-PMH Target OAI-PMH verbs
  • ARIADNE Harvester
    • Incremental, scheduled harvesting
    • Supports SPI specification
    • Integrated with Registry, Validation, Identification, Transformation
    • RSS Alerts
    http://bit.ly/fA8e0U
  • Validation Service
    • Paste metadata record
      • e.g LOM instance
    • Select validation scheme uri
      • e.g http://ltsc.ieee.org/xsd/LOM/strict
    • Validate & Consult Validation Errors
    • Based on XSD Schema & Schematron Rules
    http://bit.ly/90va7d In markup languages , Schematron is a rule-based validation langu age for ma king assertions about the presence or absence of patterns in XML trees. It is a structu ral schema language expressed in XML using a small number of elements and XPath .
  • Example Validation Service http://bit.ly/90va7d
  • Harvesting Infrastructure External Repository ARIADNE Harvester validation service harvester log OICS 1 2 3 4 5 6
  • Federated Search with SQI
  • Simple Query Interface
    • CEN WS-LT specification (CWA 15454:2005)
      • Neutral (Query Language + Result Format), e.g. PLQL for query + LOM for results
      • Synchronous & asynchronous queries
      • Stateful & Stateless Implementation
      • Session Management
    • Example SOAP endpoint:
      • Session Management: http://ariadne.cs.kuleuven.be/ariadne-registry/services/SqiSessionManagement
      • Target: http://ariadne.cs.kuleuven.be/ariadne-registry/services/SqiTarget
    • Example RESTful endpoint:
      • http://ariadne.cs.kuleuven.be/ariadne-registry/api/sqitarget?query=ariadne&start=1&size=1&lang=plql1& format=lom
    http://www.dlib.org/dlib/january08/ceri/01ceri.html
  • Simple Publishing Interface
    • Pull with harvest, publish with push technology
    • CEN/ WS-LT CWA16097 SPI
      • Facilitate metadata & resource publishing from client tools
      • enable interoperability between components in OER federation
    http://www.dlib.org/dlib/september10/ternier/09ternier.html
  • Collection Registry http://bit.ly/cGdsYd SPI SQI OAI-PMH ARIADNE Harvester OICS
  • CEN/WS LTS N 623 4.
  • Data Model IMS LODE REGISTRY MODEL BASED ON THE ISO 2146 STANDARD: “REGISTRY SERVICES FOR LIBRARIES AND RELATED ORGANIZATIONS
    • “ Alliance to make shared online learning resources available to educators and students around the world”
    http://www.globe-info.org / >1.000.000 68.003
    • Thanks!
    Questions? http://bit.ly/c6mRZC Interested?