Semantic Grid Primer

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Semantic Grid Primer

• Who is it for?
• What would we include?
• Suggestions by Bruce, Geoffrey,Yuzhong Qu, and
  er, me.
• How will we produce it?
• Collaborative effort
• What will it look like?
• A GGF document or a set of different GGF
  documents
• A semantic portal (lordy)
• Who will help?
• Dont be shy.?

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Who is it for?

• Grid people?
• Semantic Web people?
• Semantic Web Services Initiative are gagging for
  Grid Use cases.
• Application holders?
• Who will use it when we have finished it?
• Other GGF working groups,
• Industrialists?
• Academics?
• Visionaries and policy makers?
• Long haired hackers with sandals?
• PhD students (and their advisors) looking for a
  topic?

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Semantic Grid Primer

• Semantics 101
• Ontology 101
• Semantic Grid vision and roadmap
• Practical Semantic Grid
• Grid compliant knowledge services
• Grid aware knowledge services
• Knowledge aware Grid services
• Semantic Science Applications
• E.g. ontology for controlling data content
• Examples, examples, examples. Of all of it.
• Where do I find out more?

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Semantics 101

• What actually is an Ontology?
• e.g. when is a bunch of RDF specifications not an
  Ontology? What am I doing if I use RDF to specify
  properties (using perhaps Annotation tools) and
  then interpret properties in a nifty python
  program
• What are the languages for building ontologies
  and metadata?
• How do they interrelate? RDF(S), OWL Lite, OWL
  DL, Topic Maps
• Whats their relative strengths and weaknesses?
• Can I migrate from one to the other or do I have
  to get the choice right first time?
• Are they standards?
• How much or how little do I need to build one?
• How far can one go by just using "triple" in RDF
  and ignoring rest in RDF RDFS DAML OWL ...
• What tools do I need and what tools exist?
• What do other people use and why?
• Which of the tools actually work in various
  areas annotation, access/storage/search etc?
• Whats their licensing arrangements, reliability
  etc

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Ontology 101

• How do I get started?
• Is there an ontology I can use already?
• How do I build an ontology or adapt one I just
  found?
• How do I know if an ontology is good or at
  least good enough.
• Training opportunities and tutorials
• Reference demonstrators

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Semantic Grid vision

• Semantic Grid vision
• A Grid of knowledge? Knowledge used by Grid
  components?
• What are the characteristics?
• Examples of possible or existing Semantic Grid
  applications
• Is the Semantic Grid sufficient for scientific
  users using Grid?
• What are the issues and challenges in the context
  of Grid?
• What are the possible research topics?
• What isnt research because its doable now?
• Who will use it? (who are the possible suppliers
  and consumers?)
• Benefits and drawbacks (no such thing as a free
  lunch)

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Semantic Grid in practice

• How to make knowledge services Grid Compliant.
• knowledge services converted to be Grid services
  with life time management, state management, and
  fulfil the standards for service level agreements
  of Grid service portTypes.
• E.g. event notification compliance for annotation
  service and ontology service updates.
• E.g. using the Access Grid in the development of
  distributed community-based ontologies

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Semantic Grid in practice

• Opportunities for Knowledge Services to become
  Grid Aware.
• The adoption of Grid Base services by Semantic
  Services.
• E.g. an ontology or annotation service uses a
  OGSA-DAI complaint database for storage
• E.g. Grid replication protocols for version
  management and cache-coherency for distributed
  ontology services
• E.g. Grid event notification frameworks for
  propagating updates amongst a distributed
  ontology environment
• E.g. harnessing Condor-G flocks for high
  performance reasoning.

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Semantic Grid in practice

• Opportunities for Grid services to become
  Knowledge Aware or Knowledge assisted i.e.
  Semantic Grid Services
• Base services
• E.g. semantic based resource brokering by
  matchmaking using ontology inference engines
• E.g. resource scheduling using agent-planning
  techniques
• High level services
• E.g. semantic grid registries and semantic based
  discovery of Grid services
• E.g. semantic workflow resolution.

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Emerging themes

• Stratification of knowledge and metadata
• Different layers of abstractions
• Abstract workflows/Classes of services vs
  concrete workflows/bound service instances
• Multiple and different views of knowledge
• Data vs process
• Context awareness
• Different users
• User use vs machine use
• Semantic scientific workflows
• Automation and manual intervention
• Safe automation, safe repair
• A range of ontologies
• Services, algorithms
• Common functions
• Semantic search, semantic mediation, semantic
  brokering
• Various architectures

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Semantic Science Applications

• An ontology for controlling database contents
• Knowledge bases for my domain
• Not strictly the Grid .?

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How?

• Collaborative effort
• Partition up into sections
• Section authors (5-6 sections)
• Editors (two)
• Readers
• Get some effort from the Semantic Web community
• Document management system
• Access Grid and Teleconferences
• F2F at GGF10 GGF11, and ISWC WWW

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What form will it take

• A GGF document or a set of GGF docs?
• A Semantic Portal (eating your own dog food is
  unpleasant . Dont all volunteer at once ? )
• A publication opportunity (yes, we know how to
  motivate people.) with a deadline
• A tutorial at a big event, .e.g.
• GGF Summer School 2004 ??? Which one? Both?
• Output to other GGF working groups, e.g.
  applications. Sections of primer targeted to
  different groups

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Who is going to make it a reality?

• You are!
• Roll up!

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Butler 03
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Dimensions

• Knowledge networks
• multiple sets of discipline expertise,
  information, and knowledge that can be aggregated
  to analyze a problem of scientific, business or
  societal interest
• individuals and groups, workflows, data
  repositories, notes, and digital archives
• Knowledge-generating services
• identify patterns, suggest courses of action, and
  publish results that are of interest to various
  individuals and groups
• Knowledge-aware, knowledge-based, or
  knowledge-assisted Grid services,
• distributed computational components of the Grid
  that make use of knowledge
• intelligent portals, recommender systems, problem
  solving environments, semantic-based service
  discovery or resource brokering, semantic data
  integration, and workflow composition planning.
• Grid knowledge services
• the services and technologies for (global)
  distributed knowledge management to be used by
  networks, Grid services, and Grid applications.
• ontologies for defining and relating concepts in
  a domain, ontology languages for representing
  them, and ontology services for querying them or
  reasoning over them to infer new concepts.