Information about http://events.linkeddata.org/ldow2008/papers/00-bizer-heath-ldow2008-intro.pdf
Linked Data on the Web (LDOW2008) …
Tags: beijing china, bizer, data applications, data search, data web, document web, freie universit, global information space, hypertext links, kingsley idehen, openlink software, query capabilities, query results, relational databases, search engines, talis, tim berners lee, traditional document, wide web conference, world wide web conference,Pages: 2
Language: english
Created: Sun Mar 2 11:54:47 2008
Display cached document
Page 1
Page 2
Linked Data on the Web (LDOW2008)
Workshop at the 17th International World Wide Web Conference
Beijing, China, April 22, 2008
Christian Bizer Tom Heath Kingsley Idehen Tim Berners-Lee
Freie Universität Berlin Talis OpenLink Software W3C
Germany United Kingdom USA USA
chris@bizer.de tom.heath@talis.com kidehen@openlinksw.com timbl@w3.org
ABSTRACT hypertext links, the Web of Data can be crawled by following
The Web is increasingly understood as a global information space RDF links. Working on the crawled data, search engines can
consisting not just of linked documents, but also of Linked Data. provide sophisticated query capabilities, similar to those provided
More than just a vision, the resulting Web of Data has been by conventional relational databases. Because the query results
brought into being by the maturing of the Semantic Web themselves are structured data, not just links to HTML pages,
technology stack, and by the publication of an increasing number they can be immediately processed, thus enabling a new class of
of data sets according to the principles of Linked Data. applications based on the Web of Data.
The Linked Data on the Web (LDOW2008) workshop brings The glue that holds together the traditional document Web is the
together researchers and practitioners working on all aspects of hypertext links between HTML pages. The glue of the data web is
Linked Data. The workshop provides a forum to present the state RDF links. An RDF link simply states that one piece of data has
of the art in the field and to discuss ongoing and future research some kind of relationship to another piece of data. These
challenges. In this workshop summary we will outline the relationships can have different types. For instance, an RDF link
technical context in which Linked Data is situated, describe that connects data about people can state that two people know
developments in the past year through initiatives such as the each other; an RDF link that connects information about a person
Linking Open Data community project, and look ahead to the with information about publications in a bibliographic database
workshop itself. might state that a person is the author of a specific paper.
Categories and Subject Descriptors 2. THE LINKING OPEN DATA PROJECT
Evidence of the emergence of a Web of Data comes from the
H.3.5. [Information Storage and Retrieval]: Online Information
Linking Open Data project1, a grassroots community effort
Services Data sharing. H.3.5. [Information Storage and
founded in February 2007 and supported by the W3C Semantic
Retrieval]: Online Information Services Web-based services.
Web Education and Outreach Working Group2. The aim of the
project is to identify data sets that are available under open
1. THE WEB OF DATA licenses, re-publish these in RDF on the Web and interlink them
Linked Data is about employing the Resource Description with each other.
Framework (RDF) and the Hypertext Transfer Protocol (HTTP) to
publish structured data on the Web and to connect data between During 2007, the size of the Web of Data that directly stems from
different data sources, effectively allowing data in one data source this community effort has grown to over two billion RDF triples,
to be linked to data in another data source. originating from data sets in diverse domains such as geographic
information, census information, people, companies, online
The principles of Linked Data were first outlined by Berners-Lee communities, human languages, scientific publications, films,
in 2006 [1], and provide broad guidance upon which data music, books and reviews3. These data sets are interlinked by
publishers have begun to realize the Web of Data. This guidance around three million RDF links.
has been extended by technical documents such as [2][3] that
capture best practices emerging from the Linked Data community An indication of the range and scale of the Linking Open Data
and provide recipes on which publishing systems can be based. "cloud" is provided in Figure 1. As this diagram shows, key
interlinking hubs are sites such as DBpedia4 and Geonames5.
The Web of Data can be accessed using Linked Data browsers, DBpedia extracts RDF triples from the "Infoboxes" commonly
just as the traditional Web of documents is accessed using HTML seen on the right hand side of Wikipedia articles, and makes these
browsers. However, instead of following links between HTML available on the Web in RDF to be crawled or queried with
pages, Linked Data browsers enable users to navigate between
different data sources by following RDF links. This allows the
user to start with one data source and then move through a 1
http://esw.w3.org/topic/SweoIG/TaskForces/CommunityProjects/
potentially endless Web of data sources connected by RDF links. LinkingOpenData
Just as the traditional document Web can be crawled by following 2
http://www.w3.org/2001/sw/sweo/
3
http://richard.cyganiak.de/2007/10/lod/
Copyright is held by the author/owner(s). 4
LDOW2008, April 22, 2008, Beijing, China. http://dbpedia.org/About
5
http://www.geonames.org/
Figure 1. The Linking Open Data "cloud", February 2008
SPARQL. Geonames in turn provides RDF descriptions of innovative applications that consume Linked Data, and shape
millions of geographical locations worldwide. DBpedia and the agenda and identify upcoming research issues for the next
Geo-names provide URIs (and RDF descriptions) for many of development stage of the Web of Data.
the things in the world to which we want to refer. As these URIs
The program of papers to be presented at the workshop
are reused within other data sets, DBpedia and Geonames
demonstrates ongoing innovation not just in populating the Web
develop into hubs to which an increasing number of other data
of data, but in developing applications that exploit this
sets are connected, thereby increasing the potential for network
ecosystem for end users, and in advancing conceptual and
effects.
architectural issues related to the field. In total 37 papers and
In addition to publishing and interlinking data sets, there is also demos were submitted for review, of which 23 were accepted
ongoing work within the community project on Linked Data for presentation at the workshop and inclusion in the
browsers, Linked Data crawlers, Web of Data search engines proceedings.
and other applications that consume Linked Data from the Web.
We would like to extend our sincere thanks to the LDOW2008
Examples of Linked Data browsers6 are Tabulator, Disco, the
Program Committee for the efforts they expended in reviewing
OpenLink data browser and the Zitgist browser. Examples of
the submitted papers, and to the WWW2008 organizers for their
Web of Data search engines7 and lookup indexes are Falcons,
support of the workshop. For more information about the
Sindice, Swoogle and Watson. These services enable humans
workshop program please refer to the workshop website:
and machines to locate and query Linked Data that has been
published across the Web. http://events.linkeddata.org/ldow2008/
3. THE LDOW2008 WORKSHOP 4. REFERENCES
The goal of the workshop is to provide a forum for the Linked [1] Berners-Lee, T. Linked Data. 2006.
Data community, in which participants can present and discuss http://www.w3.org/DesignIssues/LinkedData.html
approaches to publishing Linked Data on the Web, showcase
[2] Bizer, C., Cyganiak, R., Heath, T. How to Publish Linked
Data on the Web. 2007. http://www4.wiwiss.fu-
6
http://esw.w3.org/topic/TaskForces/CommunityProjects/ berlin.de/bizer/pub/LinkedDataTutorial/
LinkingOpenData/SemWebClients [3] Sauermann, L., Cyganiak, R., Ayers, D., Völkel, M. Cool
7 URIs for the Semantic Web. 2007.
http://esw.w3.org/topic/TaskForces/CommunityProjects/
LinkingOpenData/SemanticWebSearchEngines http://www.w3.org/TR/cooluris/