DAIS for RDF BOF

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DAIS for RDF BOF

• Isao Kojima
• kojima_at_ni.aist.go.jp
• Data Grid Team
• Grid Technology Research Center
• AIST
• Japan
• http//www.dbgrid.org/

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Introduction

• Who am I? Isao Kojima AIST,
  Japan
• Currently leading following AIST datagrid
  research topics related with RDF
• OGSA-DAI-RDF Extending OGSA-DAI world to the
  Semantic Web
• RDF processing OGSA-DAI Activities
• Query language SPARQL
• RDFCube P2P based Distributed RDF Query
  Processing
• Construct a special index structure on top of DHT
• Provides efficient RDF set-oriented operation
• S-MDS enhance MDS4 framework to support
  S(semantics)
• Supports OWL-S ontology for data/computing
  resources
• Supports Continual RDF Query for dynamic resource
  monitoring
• Target Large scale distributed RDF data
• Approach Query language based application

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RDF (Resource Description Framework)

• Common metadata/knowledge description in
  Semantic Web Applications
• Number of RDF data is increasinggtNeed for
  database technology/specs

Trusted SW
Proof
Statement creator of http//gtrc.aist.go.jp/a.
matono/ is matono
Logic
Rules
Signature
Encryption
Ontology
object
DAIS Next?
RDF Schema
RDF
DAIS NOW
Namespaces
XML
Unicode
URI
XML-based Format
Layer Cake of the Semantic Web
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DAIS for RDF initial proposalhttp//www.dbgrid.o
rg/dais-recharter-bof.htm

• Focus/Purpose
• RDF (resource description framework) is a
  standard framework for expressing semantic
  metadata and is widely used in semantic web and
  semantic grid applications. An enormous amount of
  RDF data has been created and stored in various
  applications and research projects.
• The query language SPARQL is currently under
  discussion at W3C as a standard query language
  for RDF. DAIS-WG, which aims to provide a
  standard interface for databases, should cover
  RDF databases within the OGSA-based grid
  framework.
• Scope
• Setting RDF data access specification
  (WS-DAI-RDF) based on the existing WS-DAI
  specification, which is discussed within the
  DAIS-WG.

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What we want to do(Detail of the DAIS specs will
be given by DAIS-WG)
Sets general pattern for other DAIS
realizations.
WS-DAI
WS-DAI-RDF (WS-DAI-Ont?)
WS-DAIR
WS-DAIX
Files
WS-DAIO
Will be defined in DAIS Looking for more authors
Currently being defined In DAIS
Draft based on Posix. Looking for a willing
author.
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Aim of the BOF

• (Formally) Re-chartering of current DAIS-WG
• to add RDF specialization
• (we must set goals, milestones and deliverables)
• BOF 1st Step to Share the Motivation
  Information
• GGF DAIS-WG
• GGF Semantic Grid RG
• W3C Data Access Working Group (SPARQL)
• Systems and Applications
• RD activities
• Discussion
• Scope
• Approach
• Schedule Outputs

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Agenda

• Introduction Background
• Motivation for the BOF
• Related GGF Specs and Research Activities
• DAIS WG Dave
  Pearson
• Semantic Grid RG Carole
  Goble
• RD Projects (current potential candidates for
  the reference implementations)
• Ontogrid,WS-DAI-Ont Asuncion
  Gomez Perez
• OGSA-DAI-RDF
• Related Issues Isao
  Kojima
• If anybody want to present something, feel free
  to present here.
• Discussion

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OGSA-DAI-RDF and Related Topics

• Isao Kojima
• Data Grid Team
• Grid Technology Research Center
• AIST
• Japan

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• OGSA-DAI-RDF implementation
• Add RDF database type to uk e-Science OGSA-DAI
  database middleware
• RDF handling Activities including SPARQL
  QueryStatementActivity
• Provides GUI for SPARQL
• Supports OWL/RDFS ontology
• Supports Jena and Sesame
• DBMS Oriented Research
• (currently focus on the Query
  language)
• Presented Yesterday at Semantic Grid Workshop
• Presentation is on http//www.semanticgrid.org/GGF
  /ggf16/ and
• soon also on our Website.

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Query LanguageWhat is SPARQL?

• SQL-like RDF Query Language
• PREFIX rdf lthttp//www.w3.org/1999/02/22-rdf-
  syntax-nsgt
• PREFIX dc lthttp//purl.org/dc/elements/1.1/gt
  
• PREFIX lthttp//example/nsgt
• SELECT ?book ?title WHERE ?t rdfsubject
  ?book . ?t rdfpredicate dctitle . ?t rdfobject
  ?title . ?t saidBy " Bob" .
• Will be standard at W3C data access working
  group (DAWG)
• Current Last call working draft comments due
  10th Feb.
• SPARQL Query Result XML Format is also on the
  same schedule
• lt?xml version"1.0"?gt
• ltsparql xmlns"http//www.w3.org/2005/sparql-resul
  ts"gt
• ltheadgt
• ltvariable name"x"/gt
• ltvariable name"hpage"/gt
• ltvariable name"name"/gt
• ltvariable name"mbox"/gt
• ltvariable name"blurb"/gt lt/headgt ...
• lt/sparqlgt

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SPARQL example on OGSA-DAI-RDF
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Distributed SPARQL Processing using OGSA-DAI
Activity Framework
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Related Issues
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DAIS for RDF

• Products
• RDF database systems
• Jena
• Sesame
• Oracle RDF option
• etc
• Specifications
• W3C RDF-related standards
• RDF Query Language SPARQL will be W3C standard
• SPARQL/XML format
• SPARQL protocol
• Grid-based RD Projects
• OGSA-DAI-RDF (by AIST)
• Ontogrid WS-DAI-Ont WS-DAI-Ont-RDF (Ontogrid)

RDF storage is now commonly used and the impact
of the spec will be large
Little need to rely on unstable specs
We already have 2 potential candidates for
reference implementations for coming
WS-DAI-RDF/Ontology
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DAIS and SPARQL Protocol

• W3C Data Access Working Group defined SPARQL
  interface protocol
• WSDL1.1 and HTTP binding are discussed.
• Working Draft is on the same schedule with
  SPARQL,SPARQL/XML (HTTP)
• Simple interface
• No WSRF
• No GSI(login)

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• SPARQL protocol and WS-DAI (and WS-DAI-RDF)
• Must have some interoperability
• Technical problem must be discussed.
• Liaison with W3C activity if needed.
• W3C RDF DAWG (Data Access Working Group)
• Current Possible Contact Person Hiroyuki Sato
  (NTT) will help us.

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• ?

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Discussions

• Scope Target
• Discussion Format
• Goals
• Milestones/Schedules
• Deliverables
• .

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Initial proposal was

• Goals
• The following will be added to the current
  DAIS goals/milestones. 
• Data Service Specification RDF
  Realization (ontology?)
• Milestones 
• Sep 2006     Initial draft of the WS-DAI-RDF
  specifications,
• which is consistent
  with WS-DAI and the OGSA data architecture.March
  2007 Revised draft of the WS-DAI-RDF
  specifications.June 2007   Final
  specifications, submitted as a recommendation 
• GGF Document GGF Recommendation (Due June 2007)
  Web Services Data Access and Integration The
  RDF Realization (WS-DAI-RDF)
• small scope, short term
  activity

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Scope Target
Trusted SW
Proof
Logic
Rules
Signature
Encryption
Ontology
DAIS Next?
RDF Schema
RDF
Namespaces
XML
Unicode
URI
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Discussions

• Scope Target
• Discussion Format
• Goals
• Milestones/Schedules
• Deliverables
• .