W3C RDB2RDF Working Group
The RDB2RDF Working Group has published, in September
2012, two Recommendations:
“A
Direct Mapping of Relational Data to RDF“
and
“R2RML:
RDB to RDF Mapping Language”
. The Working Group has been closed in
2012.
Semantic Web
RDB2RDF Working Group
The
mission
of the RDB2RDF Working
Group, part of the
Semantic Web Activity
, is to
standardize languages for mapping relational data and relational
database schemas into RDF and OWL. The two languages are the Direct
Mapping (DM) and the RDB2RDF Mapping Language (R2RML).
The
RDB2RDF
Working Group Charter
shows what the W3C has asked this working
group to do.
Also On This Page
W3C RDB2RDF Standards and Notes
Inputs
Schedule
Membership
Meeting Records
Current and Upcoming Events
Weekly teleconferences on
Tuesdays
12:00EST (16:00 UTC)
An agenda is sent to
rdb2rdf-wg
24 hours in advance. The
minutes
follow within a day or two.
We will be monitoring
comments
on any specification or test cases
Working Group Links
Mailing list archives:
public-rdb2rdf-wg
public-rdb2rdf-comments
Wiki
Participants
Tracker
Open
Issues
Open
Actions
Charter
RDB2RDF W3C Standards and Notes
R2RML: RDB to RDF Mapping
Language
, W3C Recommendation
A Direct Mapping
of Relational Data to RDF
, W3C Recommendation
R2RML and
Direct Mapping Test Cases
, W3C Editor's Draft
Use Cases and
Requirements for Mapping Relational Databases to RDF
, W3C
Working Draft
Inputs
Relational
Databases on the Semantic Web
, Tim Berners-Lee, Design Issue
Note, 1998-2009.
Survey of Current Approaches for Mapping of Relational Databases to
RDF
(PDF), Satya S. Sahoo, Wolfgang Halb, Sebastian Hellmann,
Kingsley Idehen, Ted Thibodeau Jr, Sören Auer, Juan Sequeda, Ahmed
Ezzat, 2009-01-31.
This document surveys the current
techniques, tools and applications for mapping between Relational
Databases (RDB) and Resource Description Framework (RDF). Some
knowledge of RDF as well as RDB concepts and technologies is assumed
for readers of this document. The survey is intended to enable the
members of the W3C RDB2RDF Incubator Group to: (1) collate the
existing state of the art in mapping approaches between RDB and RDF,
and (2) use the reference framework defined in this survey to
effectively compare the different mapping approaches.
Incubator
Group Report
, Ashok Malhotra (ed), 2009-01-31.
This document is the final report from
the RDB2RDF XG. The XG recommends that the W3C initiate a WG to
standardize a language for mapping Relational Database schemes into
RDF and OWL.
Reusable
Identifiers in the RDB2RDF mapping language
, Michael Hausenblas
and Themis Palpanas.
These are documents produced outside the RDB2RDF Working Group
that will be inputs to the standardization work of RDB2RDF WG. Please
alert the co-Chairs or Staff Contact of the Working Group if you know
of any material that you think merits inclusion.
Schedule of Deliverables
A specification for languages to map relational data and relational
schemas to RDF and OWL (tentatively called R2RML and Direct Mapping)
as W3C Recommendations.
A set of test cases to test conformance. It is up to the Working
Group to decide whether it wishes to publish this document as a W3C
Recommendation or as a Working Group Note.
Other Deliverables
These are deliverables that the group plans to produce, in line with
the scope description above, but only if the time and the available
manpower allows it. The Working Group will have to decide whether these
documents will be published as Working Group Notes or additional
Recommendations.
An alternate "human-readable" syntax for R2RML.
A set of profiles for R2RML sufficient to provide specific, simpler
functionality.
An R2RML primer.
Milestones
Specification
FPWD
LC
CR
PR
Rec, WG
Note, Wiki page
R2RML
9/2010
9/2011
12/2011
3/2012
6/2012 (Rec)
Direct Mapping
9/2010
9/2011
12/2011
3/2012
6/2012 (Rec)
R2RML Test Cases
3/2011
1/2012
3/2012 (Wiki pages)
Direct Mapping Test Cases
3/2011
1/2012
3/2012 (Wiki pages)
Note: The group will document significant
changes from this initial schedule on the group home page.
Timeline View Summary
September 2009: First teleconference
June 2010: First face-to-face meeting
July 2010: Requirements and Use Cases for the RDB2RDF Mapping
Language (R2RML)
September 2010: First Public Working Draft for R2RML
September 2010: First Public Working Draft for DM
March 2011: First Public Working Draft for R2RML Test Cases
March 2011: First Public Working Draft for DM Test Cases
September 2011: R2RML Syntax - Last Call
September 2011: DM Semantics - Last Call
December 2011: R2RML Syntax - Candidate Recommendation
December 2011: DM Semantics - Candidate Recommendation
January 2012: R2RML Test Cases - Last Call
January 2012: DM Test Cases - Last Call
March 2012: R2RML Syntax - Proposed Recommendation
March 2012: DM Semantics - Proposed Recommendation
June 2012: R2RML Syntax - Recommendation
June 2012: DM Semantics - Recommendation
March 2012: R2RML Test Cases - Final Version
March 2012: DM Test Cases - Final Version
The working group schedule is an estimate based on the
schedule
in the charter
and subject to negotiation with peer groups via
the
Semantic Web Coordination Group
Group Membership and Joining
We encourage new members of the group to introduce themselves by email.
The
full
RDB2RDF WG participants list
is available to W3C members.
If you want to join the group:
If you're affiliated with a
W3C
member organization
Use the
form
for getting a W3C account
Have your
AC
representative
nominate you using the
form
for joining this WG
Otherwise, contact the
chair and team contact
about invited expert status. That will involve
getting
an account
and filling out a
form
for copyright, patent, etc. policies
Meeting Records
The meeting records are maintained on a dedicated
Wiki
page
...
RDB2RDF history
These events pre-date the RDB2RDF Working Group:
2008/2009:
RDB2RDF
Incubator Group
25-26 October, 2007: W3C Workshop on
RDF Access to Relational
Databases
W3C Working Group Resources
Art of Consensus Guide
W3C
member confidential
World
Wide Web Consortium Process Document
14 October 2005
W3C Groups
Participants
(dbwg)
W3C member confidential
Ashok Malhorta
Oracle
Chair
Michael Hausenblas
DERI
Chair
Ivan
Herman
W3C
staff
contact
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