ILRT: Metadata: rdf-dev

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RDF Resource Guide

The Resource Description Framework (RDF) is the W3C's new metadata architecture for the Web. RDF-DEV is a site devoted to the practical application of RDF. Although primarily targetted at developers, RDF-DEV focusses in particular on the application of RDF to Internet resource discovery issues.

[1999-11-01] please note! - The RDF-DEV list is being merged into the W3C's RDF Interest Group. RDF-DEV continues as a Web site for RDF developers. Please refer to the RDF Interest Group for RDF developer discussions.

Background: from 1998-1999 RDF-DEV provided the main mailing list forum for RDF Developers. The RDF-DEV archives remain online and searchable, and an RDF-DEV Resources database is under development.

The list is currently closed for new subscribers; please consider joining the RDF Interest Group instead. RDF-DEV members seeking information about leaving the list should see the instructions at Mailbase for this. The list remains open for messages, although you are encouraged to use the RDF IG list instead.

RDF Resources

An RDF resources database is in progress, see resource listings included below. The W3C RDF home page is a good place to find the latest RDF developments. Dave Beckett also maintains a useful collection of RDF links.

Annotated links

See the browse and search interface for a more organised listing, or below for a dump of the current (pretty modest) collection of resources.

SiRPAC - Simple RDF Parser and Compiler

Description:
SiRPAC compiles RDF/XML documents into the 3-tuples of the corresponding RDF data model. The documents can reside on local file system or at a URI on the Web. Also, the parser can be configured to automatically fetch corresponding RDF schemas from the declared namespaces. SiRPAC is suitable for embedded use as well as command line use. The system also includes an interface for hooking the parser and other RDF data sources to other RDF components such as storage and query systems. Application authors will likely be interested in the 'datasource' and 'rdfconsumer' interfaces.

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RDF in Mozilla

Description:
he Resource Description Framework, or RDF, is a technology used in the Mozilla (aka Navigator 5) browser to integrate and aggregate Internet resources. These pages describe Mozilla's RDF implementation and provide links to APIs, status reports, source code, developer logs and the Aurora/sidebar user interface which provides a 'next generation bookmarks' facility based on XML and RDF.

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XMLNews.org

Description:
XML News provides "a suite of specifications for exchanging news and information using open Web standards". The XMLNews-Meta specification is interesting as it is specified both as an RDF application and via an XML DTD.

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XML.com

Description:
XML.com is a collaborative partnership between Seybold Publications and Songline Studios, an affiliate of O'Reilly & Associates. XML.com features a mix of information and services for the XML community. 'The site is designed to serve both people who are already working with XML and those HTML users who want to "graduate" to XML's power and complexity.'

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A Query and Inference Service for RDF

Description:
Abstract: 'The creation of RDF raises the prospect of a widely accepted standard for representing expressive declarative knowledge on the Web. However, just representing knowledge and information is not enough: users as well as information agents have to query and use the data in several ways. An RDF Query specification would allow a range of applications to exploit any information source which can be represented in terms of the RDF data model. This paper describes some existing techniques used in logic program evaluation and discusses the way in which the RDF data model relates to this framework.'

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W3C::RDF Perl module

Description:
The W3C::RDF module provides an RDF parser in the Perl language. An XML SAX interface is available from the same site; alternatively,the system can be used with the Expat XML parser. The RDF tools also provide for a number of query mechanisms to manipulate the parsed data.

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Resource Description Framework (RDF) Model and Syntax Specification - W3C Recommendation 22 February 1999

Description:
This is the core RDF specification, defining an abstract data model and an XML-based syntax for (meta)data interchange on the Web. 'Resource Description Framework (RDF) is a foundation for processing metadata; it provides interoperability between applications that exchange machine-understandable information on the Web. RDF emphasizes facilities to enable automated processing of Web resources. RDF can be used in a variety of application areas; for example: in resource discovery to provide better search engine capabilities, in cataloging for describing the content and content relationships available at a particular Web site, page, or digital library, by intelligent software agents to facilitate knowledge sharing and exchange, in content rating, in describing collections of pages that represent a single logical "document", for describing intellectual property rights of Web pages, and for expressing the privacy preferences of a user as well as the privacy policies of a Web site. RDF with digital signatures will be key to building the "Web of Trust" for electronic commerce, collaboration, and other applications.'

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Libwww - the W3C Protocol Library

Description:
The XML module of the libwww C library includes support for a SiRPAC-based RDF parser written in C. "Libwww is a highly modular, general-purpose client side Web API written in C for Unix and Windows (Win32). It's well suited for both small and large applications, like browser/editors, robots, batch tools, etc. Pluggable modules provided with libwww include complete HTTP/1.1 (with caching, pipelining, PUT, POST, Digest Authentication, deflate, etc), MySQL logging, FTP, HTML/4, XML (expat), RDF (SiRPAC), and much more. The purpose of libwww is to serve as a testbed for protocol experiments. "

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RDF Interest Group charter

Description:
This is the charter of the RDF Interest Group. The RDF Interest Group is a forum for W3C Members and non-Members to discuss innovative metadata applications. The interest group will focus primarily on applications of the Resource Description Framework, potential future work items related to RDF, and the relationship of that work to other activities of W3C and to the broader social and legal context in which the Web is situated.

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Innovators of the Net: Ramanathan V. Guha and RDF

Description:
An interesting (despite being marketing-driven) piece from Netscape featuring an interview with R.V.Guha, giving some background on the motivations behind RDF and related metadata architectures like MCF, including an overview of the various applications Netscape are using RDF for.

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SiLRI (Simple Logic-based RDF Interpreter)

Description:
SiLRI is a main-memory logic-based inference engine implemented in Java. It implements a major part of Frame-Logic and has support for RDF (Resource Description Format, the metadata standard of the W3C). The implemented semantics include well-founded semantics and the rule language allows general logic programs, enabling a specification like modeling.

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Resource Description Framework (RDF) Schema Specification - W3C Proposed Recommendation 03 March 1999

Description:
The RDF Schema specification describes the approach adopted in RDF for metadata vocabulary description, and defines a minimalist RDF vocabulary that can in turn be used to define application-specific vocabularies.

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W3C Data Formats

Description:
The 'W3C Data Formats' document is a response to a frequently asked question about the relationship between the various specifications for data formats. "XML is becoming increasingly adopted as a common syntax for expressing structure in data. Now the resource Description Framework (RDF), a layer on top of XML, provides a common basis for expressing semantics. Applications which allow programs to combine data logically will be built using RDF (and therefor XML) and this will enhance the modularity and extensibility of the Web. This is essential to its rapid future growth, multiplying together the strengths of new, independently developed, applications. "

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Mozilla RDF / Z39.50 Integration Project

Description:
This is a project to investigate the integration of Z39.50 search capabilities with Mozilla's RDF-based information management environment. "There are thousands of networked Z39.50 servers in existence already. It should be possible to identify some mechanism whereby the Mozilla user interface allows people to send queries to these servers and have the resulting records appear within the standard Mozilla bookmarks/sitemaps interface."

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W3C Resource Description Framework (RDF)

Description:
The W3C site is the primary authoritative point for information about the Resource Description Framework. It includes links to the current specifications, describes their status and links to other related W3C technologies such as PICS.

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The Dublin Core Initiative and Metadata Element Set

Description:
The Dublin Core intiative is home to the Dublin Core Element Set, which provides a simple, extensible base vocabulary for discovery-oriented metadata applications on the Web. See the DC web site for details of the various working groups, internationalisation efforts, RDF representation(s) and recent developments.

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The original WWW proposal, "Information Management: A Proposal"

Description:
This is an HTML version of the original March 1989 proposal that gave rise to the World Wide Web. It includes a number of ideas very closely related to those formalised as RDF some time later. Specifically, it proposes a directed, labelled graph model with link and node types that encompass metadata applications in addition to providing for simpler document linking.

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Axioms of Web Architecture 3: Metadata Architecture (Documents, Metadata and Links)

Description:
This informal discussion document by Tim Berners-Lee provides an outline of the role played by metadata and RDF in the broader Web architecture. Metadata was called "Metadata" because it started life, and is currently still chiefly, information about web resources, so data about data. In the future, when the metadata languages and engines are more developed, it should also form a strong basis for a web of machine understandable information about anything: about the people, things, concepts and ideas. We keep this fact in our minds in the design, even though the first step is to make a system for information about information."

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Press Release: W3C Issues Recommendation for Resource Description Framework (RDF)

Description:
W3C Press Release of 24 February 1999: Leading the Web to its full potential, the World Wide Web Consortium (W3C) today releases the Resource Description Framework (RDF) Model and Syntax specification as a W3C Recommendation, representing cross-industry and expert community agreement on a wide range of features for using and providing metadata on the Web. A W3C Recommendation indicates that a specification is stable, contributes to Web interoperability, and has been reviewed by the W3C Membership, who favor its adoption by the industry.

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Last updated: $Date: 1998/10/13 16:17:18 $