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DAIS for RDF BOF

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Title: DAIS for RDF BOF


1
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/

2
GGF Intellectual Property Policy
  • I acknowledge that participation in GGF16 is
    subject to the GGF Intellectual Property Policy.
  • Intellectual Property Notices Note Well All
    statements related to the activities of the GGF
    and addressed to the GGF are subject to all
    provisions of Section 17 of GFD-C.1 (.pdf), which
    grants to the GGF and its participants certain
    licenses and rights in such statements. Such
    statements include verbal statements in GGF
    meetings, as well as written and electronic
    communications made at any time or place, which
    are addressed to the GGF plenary session,
  • any GGF working group or portion thereof,
  • the GFSG, or any member thereof on behalf of the
    GFSG,
  • the GFAC, or any member thereof on behalf of the
    GFAC,
  • any GGF mailing list, including any working group
    or research group list, or any other list
    functioning under GGF auspices,
  • the GFD Editor or the GWD process
  • Statements made outside of a GGF meeting, mailing
    list or other function, that are clearly not
    intended to be input to an GGF activity, group or
    function, are not subject to these provisions.
  • Excerpt from Section 17 of GFD-C.1 Where the GFSG
    knows of rights, or claimed rights, the GGF
    secretariat shall attempt to obtain from the
    claimant of such rights, a written assurance that
    upon approval by the GFSG of the relevant GGF
    document(s), any party will be able to obtain the
    right to implement, use and distribute the
    technology or works when implementing, using or
    distributing technology based upon the specific
    specification(s) under openly specified,
    reasonable, non-discriminatory terms. The working
    group or research group proposing the use of the
    technology with respect to which the proprietary
    rights are claimed may assist the GGF secretariat
    in this effort. The results of this procedure
    shall not affect advancement of document, except
    that the GFSG may defer approval where a delay
    may facilitate the obtaining of such assurances.
    The results will, however, be recorded by the GGF
    Secretariat, and made available. The GFSG may
    also direct that a summary of the results be
    included in any GFD published containing the
    specification. GGF Intellectual Property
    Policies are adapted from the IETF Intellectual
    Property Policies that support the Internet
    Standards Process.

3
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

4
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
5
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.

6
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.
7
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

8
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

9
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10
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11
OGSA-DAI-RDF and Related Topics
  • Isao Kojima
  • Data Grid Team
  • Grid Technology Research Center
  • AIST
  • Japan

12
  • 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.

13
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

14
SPARQL example on OGSA-DAI-RDF
15
Distributed SPARQL Processing using OGSA-DAI
Activity Framework
16
Related Issues
17
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
18
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)

19
  • 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.

20
  • ?

21
Discussions
  • Scope Target
  • Discussion Format
  • Goals
  • Milestones/Schedules
  • Deliverables
  • .

22
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

23
Scope Target
Trusted SW
Proof
Logic
Rules
Signature
Encryption
Ontology
DAIS Next?
RDF Schema
RDF
Namespaces
XML
Unicode
URI
24
Discussions
  • Scope Target
  • Discussion Format
  • Goals
  • Milestones/Schedules
  • Deliverables
  • .
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