Sesame is an Open Source RDF Schema-based
Repository and Querying facility
- Sesame
aidministrator nederland bv Home Page
Dear W3C Director,
WhereAs
The RDFCore Working Group decided ( 2003-11-07 meeting record in progress) to request that you advance this specification to W3C Proposed Recommendation and commence W3C Advisory Committee review.
A version of this document which may have been updated, possibly with new implementation experience or to reflect the status of the specifications, is linked from the RDFCore overview page.
The Working Group has developed the following specification, test materials, and supplementary documentation for RDF:
Editor's draft notes changes since 10 Oct last call. (v 1.50 includes changes discussed 7Nov)
Changes as discussed in replies to commentors 17 Oct and 7 Nov are to appear in an editor's draft presently.
Editorial revisions in response to a detailed review of the proofs by ter Horst have been integrated into the editor's draft. Changes since the 10 Oct WD are noted.
editorial updates in response to comments submitted 10 Oct, 5 Nov, 7 Nov and 7 Nov are to appear in an editor's draft presently.
editor's draft notes recent changes.
Review of the above drafts began drafts of RDF Semantics and RDF Syntax in September 2001 and RDF Schema in April 2002. Remaining parts of the original RDF Model and Syntax specification appeared subsequently in RDF Concepts and Abstract Syntax, supplemented by the RDF Primer.
The working group addressed comments on these drafts on a best-effort basis as it worked thru its list of 60+ issues.
After resolving all of the issues, last call working drafts were published in January 2003 and last call comments were formally addressed. The Working Group made a number of changes in response to these comments, and then issued a second last call in October 2003. Comments on the 2nd last call were also formally addressed.
While the vast majority of the issues were resolved by consensus, three issues with outstanding objections remain: datatypes, XML Literals, and validating RDF.
The the RDF Core test case results and the following implementation exprience validate the design and motivates widespread deployment.
| Title: | Sesame |
| Contact: | Arjohn Kampman Jeen Broekstra |
| Language: | Java |
| Description: |
Sesame is an Open Source RDF Schema-based
Repository and Querying facility
- Sesame aidministrator nederland bv Home Page |
| Title: | Drive |
| Contact: | Rahul Singh |
| Language: | C# |
| Description: |
Drive is an RDF parser written in C# for the .NET
platform. Its fully compliant with the W3C RDF syntax
specification and is available as open source under the
terms of the GNU LGPL license.
- Drive Home Page |
| Title: | Raptor RDF Parser Toolkit |
| Contact: | Dave Beckett |
| Language: | C |
| Description: |
Raptor is a free software/Open Source C library
that parses RDF syntaxes such as RDF/XML and N-Triples
into RDF triples.
Raptor was designed to work closely with the Redland RDF library (RDF Parser Toolkit for Redland) but is entirely separate. It is a portable library that works across many POSIX systems (Unix, GNU/Linux, BSDs, OSX, cygwin, win32). Raptor has no memory leaks and is fast. - Raptor Home Page |
| Title: | TAP |
| Contact: | R.V. Guha, Rob McCool |
| Language: | |
| Description: |
TAP is an
application framework for Building the Semantic Web.
TAP's goals are to enable the Semantic Web by providing
some simple tools that make the web a giant distributed
Database. TAP is open source development effort by R.V.
Guha (IBM) and Rob McCool (Stanford) which provide a
set of protocols and conventions that create a coherent
whole of independantly produced bits of information,
and a simple API to navigate the graph. Local,
independantly managed knowledge bases can be aggegated
to form selected centers of knowledge useful for
particular applications.
- TAP - An Application Framework for Building the Semantic Web |
| Title: | Redfoot |
| Contact: | Daniel Krech |
| Language: | Python |
| Description: |
Redfoot is a
program for managing and sharing RDF information using
RDFLib. Redfoot is
currently geared mostly to the developer, but is
shifting in the direction of the end user.
- Redfoot Home Page |
| Title: | Euler |
| Contact: | Jos De Roo |
| Language: | C# |
| Description: |
EulerSharp is an inference engine supporting
logic based proofs. It is a backward-chaining reasoner
enhanced with Euler path detection and will tell you
whether a given set of facts and rules supports a given
conclusion. It is interoperable with W3C Cwm. -
Sourceforge
EulerSharp
project
|
| Title: | ARP Another RDF Parser |
| Contact: | Jeremy Carroll |
| Language: | Java |
| Description: |
| Title: | Joseki |
| Contact: | Andy Seaborne |
| Language: | Java |
| Description: |
Joseki is a server for publishing RDF models on
the web. Models have URLs and they can be accessed by
query using HTTP GET. Joseki is part of the
Jena RDF
toolkit. Joseki provides a coarse-grained
web
API that is based on extracting a subgraph from the
published RDF. The extracted RDF can then be processed
locally with the fine-grained API provided by
Jena.
- Joseki Home Page |
| Title: | PerlRDF |
| Contact: | info@gingerall.com |
| Language: | Perl |
| Description: |
PerlRDF is a Perl implementation of RDF storage,
parser and serializer. The storage's functionality is
store, delete and query statements, where query means
ask about existence of statements conforming a given
mask (subject, predicate, object). Three storages are
available - in memory, file (DB_File) and DBMS
(PostgreSQL). The parser makes use of XML::Parser and
supports full RDF/XML syntax including changes from
2003. The serializer tries to preserve anonymous nodes
and to compact xml by grouping statements with common
subject. Besides the basic querying, there is a
resource-centric query language implemented. RDF::Core
also provides a basic object oriented interface for the
RDF Schema manipulation.
- PerlRDF Home Page |
| Title: | IsaViz |
| Contact: | Emmanuel Pietriga |
| Language: | Java |
| Description: |
IsaViz is a visual environment for browsing and
authoring RDF
models represented as graphs.
- IsaViz Home Page |
| Title: | RDFlib |
| Contact: | Daniel Krech |
| Language: | Python |
| Description: |
RDFLib is a
Python library for
working with RDF,
a simple yet powerful language for representing
information. The library contains an
RDF/XML
parser/serializer, a
TripleStore, an
InformationStore and various store backends
(InMemory, SleepyCat BTree, ZODB BTree).
- RDFLib Home Page |
| Title: | Wilbur |
| Contact: | Ora Lassila |
| Language: | Lisp |
| Description: |
Wilbur is a toolkit for writing RDF-enabled
software. Wilbur is written in CLOS, and includes an
RDF parser, a DAML parser, an XML parser, an API for
managing "RDF data", and a simple HTTP client; it also
includes a simple (and at this point experimental)
frame system on top of RDF & DAML.
- Wilbur: Nokia's RDF Toolkit for CLOS |
| Title: | Jena2 - A Semantic Web Framework |
| Contact: | Brian McBride |
| Language: | Java |
| Description: |
Jena is a Java framework for building Semantic
Web applications. It provides a programmatic
environment for RDF, RDFS and OWL, including a
rule-based inference engine. Jena is open source and
grown out of work with the HP Labs Semantic Web
Programme.
- Jena Sourceforge project page |
| Title: | BrownSauce RDF Browser |
| Contact: | Damian Steer |
| Language: | Java |
| Description: |
There is RDF data all over the place, in XML
documents and sources like databases. Getting all that
data is impractical, and would be unreadable (to say
the least). So BrownSauce is an attempt to make
something which can browse that information.
BrownSauce breaks the problem into two parts: coarse-graining (breaking the data down into usable chunks, like 'information about person X) and aggregation (making those chunks from multiple sources). The first part is done, and users can browse more than one source using rdfs:seeAlso references. Aggregation is currently being worked on. BrownSauce runs as a local http server, or can be added to a java web application server like Tomcat or Jetty. The current interface is HTML and can be styled using CSS (the HTML is marked up using classes relating to the RDF). Other interfaces should be simple to implement. - BrownSauce RDF Browser Home Page |
| Title: | Intellidimension's RDF Gateway |
| Contact: | Geoff Chappell |
| Language: | |
| Description: |
RDF Gateway is a platform designed from the
ground up for the Semantic Web. It's an application
server, a web server, and a deductive RDF database
server all in one. RDF Gateway offers a familiar
programming model and language that enables today's web
and database developers to quickly begin creating
Semantic Web applications that can be easily deployed
to workstations and servers running RDF
Gateway.
- RDF Gateway Home Page |
| Title: | RAP - RDF API for PHP |
| Contact: | Chris Bizer |
| Language: | PHP |
| Description: |
RDF API for PHP is a pure PHP software package
for parsing, manipulating and serializing RDF
models.
- RAP - RDF API for PHP Home Page |
| Title: | Swish |
| Contact: | Graham Klyne |
| Language: | Haskell |
| Description: |
Swish is a toolkit for Semantic Web inference written in Haskell. It is being developed to support simple Semantic web applications, through the creation of generic and specific command-line RDF inference programs, with a particular view to inclusion of datatype-aware reasoning. Datatype reasoning is seen as a way for controlled inclusion of additional processing capabilities into a simple RDF inference process. The current released version of Swish contains a Notation3 parser, together with graph comparison and merging capabilities. A framework for implementing various kinds of rules, including datatype constraint reasoning, is at an advanced state of development, and is hoped to be released before the end of 2003. It is intended that this framework can be used as a testbed for exploring RDF inference features required to build real applications, a motivating example of which is a network access control configuration experiment undertaken as part of the SWAD-E project (cf. http://www.ninebynine.org/SWAD-E/Intro.html#HomeNetAccessDemo). - ANNOUNCE: SW Inferencing Skeleton in Haskell (Swish), Graham Klyne, Fri, 06 Jun 2003 |
CVS log of changes since 7Nov WG decision:
$Log: 20030331-advance.html,v $ Revision 1.39 2003/12/03 14:43:19 em updated to make xhtml valid Revision 1.38 2003/11/17 10:15:28 bmcbride Added reference to WG version of request Revision 1.37 2003/11/17 10:01:08 bmcbride updated doc status Revision 1.36 2003/11/14 18:52:39 bmcbride Removed draft status and final @@'s Revision 1.34 2003/11/13 20:24:28 em added hr Revision 1.33 2003/11/13 20:23:18 em style changes Revision 1.32 2003/11/13 20:22:00 em style changes Revision 1.31 2003/11/13 20:18:01 em updated to wrap up impl section Revision 1.30 2003/11/13 20:16:49 em updated to wrap up impl section Revision 1.29 2003/11/13 20:12:24 em updated to wrap up impl section Revision 1.28 2003/11/13 20:08:37 em updated to wrap up impl section Revision 1.27 2003/11/13 19:44:26 em updated to fix merge problems in summary of review section Revision 1.26 2003/11/13 19:41:25 em updating implementation section Revision 1.25 2003/11/12 22:33:58 connolly rewrote summary of review, noting when 1st WDs went out, telling good news about lots of issues resolved by consensus. left an @@ to represent the pending responses to LC2 comments Revision 1.24 2003/11/12 21:49:48 connolly punted pending edits on test, concepts to Brian completed this pass of the titles section Revision 1.23 2003/11/12 18:54:32 connolly cited current primer, pending edits Revision 1.22 2003/11/12 18:07:06 connolly cited semantics LC2, editor's draft, noted pending changes Revision 1.21 2003/11/12 15:39:27 connolly finished citing schema for request-for-PR purposes; noted minor changes pending Revision 1.20 2003/11/12 15:23:32 connolly cited syntax spec: 10Oct LC version, editors draft, changes Revision 1.19 2003/11/12 14:49:48 connolly link WG decision, start change log