PUMA publications for /user/hotho/2.0https://puma.uni-kassel.de/user/hotho/2.0PUMA RSS feed for /user/hotho/2.02024-03-29T10:49:08+01:00Publikationen im Web 2.0https://puma.uni-kassel.de/bibtex/25c84f670315f76a9e7fc9857738d571e/hothohotho2012-10-22T09:22:15+02:002.0 2012 management myown publications publikationen web web2.0 <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Andreas Hotho" itemprop="url" href="/author/Andreas%20Hotho"><span itemprop="name">A. Hotho</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>Informatik-Spektrum</em></span></span> </span>(<em><span>2012<meta content="2012" itemprop="datePublished"/></span></em>)Mon Oct 22 09:22:15 CEST 2012Berlin / HeidelbergInformatik-Spektrum1-5Publikationen im Web 2.020122.0 2012 management myown publications publikationen web web2.0 Informatik-Spektrum, Online First™ - SpringerLinkPublikationsmanagement mit BibSonomy -- ein Social-Bookmarking-System für Wissenschaftlerhttps://puma.uni-kassel.de/bibtex/2250d83c41fb10b89c73f54bd7040bd6e/hothohotho2011-01-26T16:27:34+01:002.0 2010 bibsonomy bookmarking myown social tagging taggingsurvey web <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Andreas Hotho" itemprop="url" href="/author/Andreas%20Hotho"><span itemprop="name">A. Hotho</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Dominik Benz" itemprop="url" href="/author/Dominik%20Benz"><span itemprop="name">D. Benz</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Folke Eisterlehner" itemprop="url" href="/author/Folke%20Eisterlehner"><span itemprop="name">F. Eisterlehner</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Robert Jäschke" itemprop="url" href="/author/Robert%20J%7b%5c%22a%7dschke"><span itemprop="name">R. Jäschke</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Beate Krause" itemprop="url" href="/author/Beate%20Krause"><span itemprop="name">B. Krause</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Christoph Schmitz" itemprop="url" href="/author/Christoph%20Schmitz"><span itemprop="name">C. Schmitz</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Gerd Stumme" itemprop="url" href="/author/Gerd%20Stumme"><span itemprop="name">G. Stumme</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>HMD -- Praxis der Wirtschaftsinformatik</em></span></span> </span>(<em><span>Februar 2010<meta content="Februar 2010" itemprop="datePublished"/></span></em>)Wed Jan 26 16:27:34 CET 2011HMD -- Praxis der Wirtschaftsinformatik#feb#47-58{Publikationsmanagement mit BibSonomy -- ein Social-Bookmarking-System f{\"u}r Wissenschaftler}Heft 27120102.0 2010 bibsonomy bookmarking myown social tagging taggingsurvey web Kooperative Verschlagwortungs- bzw. Social-Bookmarking-Systeme wie Delicious, Mister Wong oder auch unser eigenes System BibSonomy erfreuen sich immer gr{\"o}{\ss}erer Beliebtheit und bilden einen zentralen Bestandteil des heutigen Web 2.0. In solchen Systemen erstellen Nutzer leichtgewichtige Begriffssysteme, sogenannte Folksonomies, die die Nutzerdaten strukturieren. Die einfache Bedienbarkeit, die Allgegenw{\"a}rtigkeit, die st{\"a}ndige Verf{\"u}gbarkeit, aber auch die M{\"o}glichkeit, Gleichgesinnte spontan in solchen Systemen zu entdecken oder sie schlicht als Informationsquelle zu nutzen, sind Gr{\"u}nde f{\"u}r ihren gegenw{\"a}rtigen Erfolg. Der Artikel f{\"u}hrt den Begriff Social Bookmarking ein und diskutiert zentrale Elemente (wie Browsing und Suche) am Beispiel von BibSonomy anhand typischer Arbeitsabl{\"a}ufe eines Wissenschaftlers. Wir beschreiben die Architektur von BibSonomy sowie Wege der Integration und Vernetzung von BibSonomy mit Content-Management-Systemen und Webauftritten. Der Artikel schlie{\ss}t mit Querbez{\"u}gen zu aktuellen Forschungsfragen im Bereich Social Bookmarking.Datenschutz im Web 2.0 am Beispiel des sozialen Tagging-Systems BibSonomyhttps://puma.uni-kassel.de/bibtex/269f3738deecd73594907183aa874ec1a/hothohotho2010-11-25T16:02:29+01:002.0 datenschutz myown tagging taggingsurvey web <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Beate Krause" itemprop="url" href="/author/Beate%20Krause"><span itemprop="name">B. Krause</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hana Lerch" itemprop="url" href="/author/Hana%20Lerch"><span itemprop="name">H. Lerch</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Andreas Hotho" itemprop="url" href="/author/Andreas%20Hotho"><span itemprop="name">A. Hotho</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alexander Roßnagel" itemprop="url" href="/author/Alexander%20Ro%c3%9fnagel"><span itemprop="name">A. Roßnagel</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Gerd Stumme" itemprop="url" href="/author/Gerd%20Stumme"><span itemprop="name">G. Stumme</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>Informatik-Spektrum</em></span></span> </span>(<em><span>2010<meta content="2010" itemprop="datePublished"/></span></em>)Thu Nov 25 16:02:29 CET 2010Berlin / HeidelbergInformatik-Spektrum1-12Datenschutz im Web 2.0 am Beispiel des sozialen Tagging-Systems BibSonomy20102.0 datenschutz myown tagging taggingsurvey web Soziale Tagging-Systeme gehören zu den in den vergangenen Jahren entstandenen Web2.0-Systemen. Sie ermöglichen es Anwendern, beliebige Informationen in das Internet einzustellen und untereinander auszutauschen. Je nach Anbieter verlinken Nutzer Videos, Fotos oder Webseiten und beschreiben die eingestellten Medien mit entsprechenden Schlagwörtern (Tags). Die damit einhergehende freiwillige Preisgabe oftmals persönlicher Informationen wirft Fragen im Bereich der informationellen Selbstbestimmung auf. Dieses Grundrecht gewährleistet dem Einzelnen, grundsätzlich selbst über die Preisgabe und Verwendung seiner persönlichen Daten zu bestimmen. Für viele Funktionalitäten, wie beispielsweise Empfehlungsdienste oder die Bereitstellung einer API, ist eine solche Kontrolle allerdings schwierig zu gestalten. Oftmals existieren keine Richtlinien, inwieweit Dienstanbieter und weitere Dritte diese öffentlichen Daten (und weitere Daten, die bei der Nutzung des Systems anfallen) nutzen dürfen. Dieser Artikel diskutiert anhand eines konkreten Systems typische, für den Datenschutz relevante Funktionalitäten und gibt Handlungsanweisungen für eine datenschutzkonforme technische Gestaltung.SpringerLink - Informatik-Spektrum, Online First™Semantic Wikipediahttps://puma.uni-kassel.de/bibtex/2a204b4b6cad0255ec900ba59aec73485/hothohotho2010-07-13T22:25:01+02:002.0 media semantic web wiki <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Max Völkel" itemprop="url" href="/author/Max%20V%5c%22%7bo%7dlkel"><span itemprop="name">M. Völkel</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Markus Krötzsch" itemprop="url" href="/author/Markus%20Kr%5c%22%7bo%7dtzsch"><span itemprop="name">M. Krötzsch</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Denny Vrandecic" itemprop="url" href="/author/Denny%20Vrandecic"><span itemprop="name">D. Vrandecic</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Heiko Haller" itemprop="url" href="/author/Heiko%20Haller"><span itemprop="name">H. Haller</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Rudi Studer" itemprop="url" href="/author/Rudi%20Studer"><span itemprop="name">R. Studer</span></a></span>. </span><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">WWW '06: Proceedings of the 15th international conference on World Wide Web</span>, </em></span><em>Seite <span itemprop="pagination">585--594</span>. </em><em>New York, NY, USA, </em><em><span itemprop="publisher">ACM</span>, </em>(<em><span>2006<meta content="2006" itemprop="datePublished"/></span></em>)Tue Jul 13 22:25:01 CEST 2010New York, NY, USAWWW '06: Proceedings of the 15th international conference on World Wide Web585--594Semantic Wikipedia20062.0 media semantic web wiki Wikipedia is the world's largest collaboratively edited source of encyclopaedic knowledge. But in spite of its utility, its contents are barely machine-interpretable. Structural knowledge, e.,g. about how concepts are interrelated, can neither be formally stated nor automatically processed. Also the wealth of numerical data is only available as plain text and thus can not be processed by its actual meaning.We provide an extension to be integrated in Wikipedia, that allows the typing of links between articles and the specification of typed data inside the articles in an easy-to-use manner.Enabling even casual users to participate in the creation of an open semantic knowledge base, Wikipedia has the chance to become a resource of semantic statements, hitherto unknown regarding size, scope, openness, and internationalisation. These semantic enhancements bring to Wikipedia benefits of today's semantic technologies: more specific ways of searching and browsing. Also, the RDF export, that gives direct access to the formalised knowledge, opens Wikipedia up to a wide range of external applications, that will be able to use it as a background knowledge base.In this paper, we present the design, implementation, and possible uses of this extension.Semantic WikipediaLogsonomy - social information retrieval with logdatahttps://puma.uni-kassel.de/bibtex/2c7f43f2f922de1e7febedd10347e80cb/hothohotho2010-04-23T13:25:51+02:002.0 2008 folksonomy implicit logsonomy myown web <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Beate Krause" itemprop="url" href="/author/Beate%20Krause"><span itemprop="name">B. Krause</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Robert Jäschke" itemprop="url" href="/author/Robert%20J%c3%a4schke"><span itemprop="name">R. Jäschke</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Andreas Hotho" itemprop="url" href="/author/Andreas%20Hotho"><span itemprop="name">A. Hotho</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Gerd Stumme" itemprop="url" href="/author/Gerd%20Stumme"><span itemprop="name">G. Stumme</span></a></span>. </span><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">HT '08: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia</span>, </em></span><em>Seite <span itemprop="pagination">157--166</span>. </em><em>New York, NY, USA, </em><em><span itemprop="publisher">ACM</span>, </em>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Fri Apr 23 13:25:51 CEST 2010New York, NY, USAHT '08: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia157--166Logsonomy - social information retrieval with logdata20082.0 2008 folksonomy implicit logsonomy myown web Social bookmarking systems constitute an established part of the Web 2.0. In such systems users describe bookmarks by keywords called tags. The structure behind these social systems, called folksonomies, can be viewed as a tripartite hypergraph of user, tag and resource nodes. This underlying network shows specific structural properties that explain its growth and the possibility of serendipitous exploration.
Today's search engines represent the gateway to retrieve information from the World Wide Web. Short queries typically consisting of two to three words describe a user's information need. In response to the displayed results of the search engine, users click on the links of the result page as they expect the answer to be of relevance.
This clickdata can be represented as a folksonomy in which queries are descriptions of clicked URLs. The resulting network structure, which we will term logsonomy is very similar to the one of folksonomies. In order to find out about its properties, we analyze the topological characteristics of the tripartite hypergraph of queries, users and bookmarks on a large snapshot of del.icio.us and on query logs of two large search engines. All of the three datasets show small world properties. The tagging behavior of users, which is explained by preferential attachment of the tags in social bookmark systems, is reflected in the distribution of single query words in search engines. We can conclude that the clicking behaviour of search engine users based on the displayed search results and the tagging behaviour of social bookmarking users is driven by similar dynamics.HT: HT '08, Logsonomy - social information ...Near-Term Prospects for Semantic Technologieshttps://puma.uni-kassel.de/bibtex/2b676addcf02f7cb15d9069aed1d0d0fd/hothohotho2010-03-21T10:54:33+01:002.0 3.0 generation next semantic web <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="V. Richard Benjamins" itemprop="url" href="/author/V.%20Richard%20Benjamins"><span itemprop="name">V. Benjamins</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="John Davies" itemprop="url" href="/author/John%20Davies"><span itemprop="name">J. Davies</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ricardo Baeza-Yates" itemprop="url" href="/author/Ricardo%20Baeza-Yates"><span itemprop="name">R. Baeza-Yates</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Peter Mika" itemprop="url" href="/author/Peter%20Mika"><span itemprop="name">P. Mika</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hugo Zaragoza" itemprop="url" href="/author/Hugo%20Zaragoza"><span itemprop="name">H. Zaragoza</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mark Greaves" itemprop="url" href="/author/Mark%20Greaves"><span itemprop="name">M. Greaves</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jose Manuel Gomez-Perez" itemprop="url" href="/author/Jose%20Manuel%20Gomez-Perez"><span itemprop="name">J. Gomez-Perez</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jesus Contreras" itemprop="url" href="/author/Jesus%20Contreras"><span itemprop="name">J. Contreras</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="John Domingue" itemprop="url" href="/author/John%20Domingue"><span itemprop="name">J. Domingue</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Dieter Fensel" itemprop="url" href="/author/Dieter%20Fensel"><span itemprop="name">D. Fensel</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>Intelligent Systems</em></span></span> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">23 </span></span>(<span itemprop="issueNumber">1</span>):
<span itemprop="pagination">76-88</span></em> </span>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Sun Mar 21 10:54:33 CET 2010Intelligent Systems176-88Near-Term Prospects for Semantic Technologies2320082.0 3.0 generation next semantic web The Semantic Web has recently been enjoying significant investment
in research, start-ups, and commercial projects. In this installment
of Trends and Controversies, several experts discuss what they hope
semantic technology will accomplish in the near future.Social Softwarehttps://puma.uni-kassel.de/bibtex/29f3afc8a39415b9a6a58c8c8c570f1d5/hothohotho2009-07-12T12:25:56+02:002.0 social software web <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Michael Bächle" itemprop="url" href="/author/Michael%20B%c3%a4chle"><span itemprop="name">M. Bächle</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>Informatik-Spektrum</em></span></span> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">29 </span></span>(<span itemprop="issueNumber">2</span>):
<span itemprop="pagination">121--124</span></em> </span>(<em><span>April 2006<meta content="April 2006" itemprop="datePublished"/></span></em>)Sun Jul 12 12:25:56 CEST 2009Informatik-Spektrum#apr#2121--124Social Software2920062.0 social software web Zusammenfassung Ausgehend vom Begriff des Web 2.0 werden die Merkmale und Möglichkeiten sog. Social Software vorgestellt. Der Beitrag erläutert
den Begriff und gibt einen Überblick über die unterschiedlichen Arten. Merkmale und Nutzenpotentiale sowie Beispiele werdenvorgestellt.Web 2.0 in der Unternehmenspraxis: Grundlagen, Fallstudien und Trends zum Einsatz von Social Softwarehttps://puma.uni-kassel.de/bibtex/28d0be8fb962353f9cb5615c35e0ccdb1/hothohotho2009-02-11T16:50:45+01:002.0 anwendungen unternehmen web <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="editor"><a title="Andrea Back" itemprop="url" href="/author/Andrea%20Back"><span itemprop="name">A. Back</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="editor"><a title="Norbert Gronau" itemprop="url" href="/author/Norbert%20Gronau"><span itemprop="name">N. Gronau</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="editor"><a title="Klaus Tochtermann" itemprop="url" href="/author/Klaus%20Tochtermann"><span itemprop="name">K. Tochtermann</span></a></span> (Hrsg.).
. </span><em><span itemprop="publisher">Oldenbourg</span>, </em>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Wed Feb 11 16:50:45 CET 2009Web 2.0 in der Unternehmenspraxis: Grundlagen, Fallstudien und Trends zum Einsatz von Social Software20082.0 anwendungen unternehmen web Web 2.0 in der Unternehmenspraxis: Grundlagen, Fallstudien und Trends zum Einsatz von Social Software: Andrea Back, Norbert Gronau, Klaus Tochtermann: Amazon.de: BücherEnterprise 2.0: The Dawn of Emergent Collaborationhttps://puma.uni-kassel.de/bibtex/2d1be3618b49f77d9e2d40310d5b9c18a/hothohotho2009-01-30T11:36:52+01:002.0 bi collaboration emergent enterprise toread <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Andrew P. McAfee" itemprop="url" href="/author/Andrew%20P.%20McAfee"><span itemprop="name">A. McAfee</span></a></span>. </span><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><span itemtype="http://schema.org/Periodical" itemscope="itemscope" itemprop="isPartOf"><span itemprop="name"><em>MITSloan Management Review</em></span></span> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">47 </span></span>(<span itemprop="issueNumber">3</span>):
<span itemprop="pagination">21-28</span></em> </span>(<em><span>2006<meta content="2006" itemprop="datePublished"/></span></em>)Fri Jan 30 11:36:52 CET 2009MITSloan Management Review321-28Enterprise 2.0: The Dawn of Emergent Collaboration4720062.0 bi collaboration emergent enterprise toread HERAUSFORDERUNG BIBLIOTHEK 2.0: Chancen und Risiken für Verbundkataloge durch die Anreicherung mit Web 2.0-Konzeptenhttps://puma.uni-kassel.de/bibtex/2e4e3604c5ebbf237222143e5ba94ae86/hothohotho2009-01-29T11:56:28+01:002.0 Bibliothek toread web <meta content="thesis" itemprop="educationalUse"/><span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Barbara Haubenwaller" itemprop="url" href="/author/Barbara%20Haubenwaller"><span itemprop="name">B. Haubenwaller</span></a></span>. </span><em>University of Applied Sciences Campus02 Fachhochschule der Wirtschaft Graz (Austria), </em>(<em><span>Januar 2009<meta content="Januar 2009" itemprop="datePublished"/></span></em>)Thu Jan 29 11:56:28 CET 2009JanuaryHERAUSFORDERUNG BIBLIOTHEK 2.0: Chancen und Risiken für Verbundkataloge durch die Anreicherung mit Web 2.0-Konzepten 20092.0 Bibliothek toread web Web 2.0, the social, interactive and user-oriented web, is an integral component of current web applications. In the context of Library 2.0-motivated service developments, some libraries already have implemented such features in their local online library catalogues. However, many library associations and library service centres that provide union catalogues seem to be reluctant to keep pace with these developments. This thesis gives an overview of existing union catalogues in the German-speaking language area that already use Web 2.0 features. Furthermore, it identifies opportunities and risks when implementing Web 2.0 concepts in a union catalogue based on a market-analysis and in-depth interviews with experts for library systems and union catalogues. The empirical study of this thesis also contains an evaluation of the existing union catalogue of the umbrella organisation of public libraries in Austria, called ?B?chereiverband ?sterreichs? (BV?). The result of this thesis includes that providers of union catalogues are aware of the relevance of the new technologies as additional features to improve the usability of union catalogues and to enrich bibliographic data with supplementary content. Still, the implementation of web 2.0 services seems to be hesitant within the German-speaking countries. The main task of union catalogues is still to provide easy and fast access to bibliographic data but web 2.0 concepts will be an important add-on in the future.