PUMA publications for /user/stumme/2008https://puma.uni-kassel.de/user/stumme/2008PUMA RSS feed for /user/stumme/20082024-03-29T07:18:04+01:00The Anti-Social Tagger - Detecting Spam in Social Bookmarking Systemshttps://puma.uni-kassel.de/bibtex/25b6b648fd25c15d594404ae26fcda6b4/stummestumme2013-03-18T14:06:44+01:002008 bookmarking detection itegpub l3s myown seminar spam summer <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="Christoph Schmitz" itemprop="url" href="/author/Christoph%20Schmitz"><span itemprop="name">C. Schmitz</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">AIRWeb '08: Proceedings of the 4th International Workshop on Adversarial Information Retrieval on the Web</span>, </em></span><em>Seite <span itemprop="pagination">61--68</span>. </em><em>New York, NY, USA, </em><em><span itemprop="publisher">ACM</span>, </em>(<em><span>April 2008<meta content="April 2008" itemprop="datePublished"/></span></em>)Mon Mar 18 14:06:44 CET 2013New York, NY, USAAIRWeb '08: Proceedings of the 4th International Workshop on Adversarial Information Retrieval on the Webapr61--68The Anti-Social Tagger - Detecting Spam in Social Bookmarking Systems20082008 bookmarking detection itegpub l3s myown seminar spam summer The annotation of web sites in social bookmarking systemshas become a popular way to manage and find informationon the web. The community structure of such systems attractsspammers: recent post pages, popular pages or specifictag pages can be manipulated easily. As a result, searchingor tracking recent posts does not deliver quality resultsannotated in the community, but rather unsolicited, oftencommercial, web sites. To retain the benefits of sharingone’s web content, spam-fighting mechanisms that can facethe flexible strategies of spammers need to be developed.Semantic Grounding of Tag Relatedness in Social Bookmarking Systemshttps://puma.uni-kassel.de/bibtex/2022ccb7184fcd0e43092fca13fd56a00/stummestumme2013-03-18T14:06:44+01:002008 grounding itegpub l3s literature myown pragmatic relatedness semantic seminar summer tagging wordnet <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ciro Cattuto" itemprop="url" href="/author/Ciro%20Cattuto"><span itemprop="name">C. Cattuto</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="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">The Semantic Web - ISWC 2008</span>, </em><em>Volume 5318 von Lecture Notes in Computer Science, </em><em><span itemprop="publisher">Springer Berlin / Heidelberg</span>, </em></span>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Mon Mar 18 14:06:44 CET 2013The Semantic Web - ISWC 2008The Semantic Web - ISWC 2008615--631Lecture Notes in Computer Science{Semantic Grounding of Tag Relatedness in Social Bookmarking Systems}531820082008 grounding itegpub l3s literature myown pragmatic relatedness semantic seminar summer tagging wordnet {Collaborative tagging systems have nowadays become important data sources for populating semantic web applications. For tasks like synonym detection and discovery of concept hierarchies, many researchers introduced measures of tag similarity. Even though most of these measures appear very natural, their design often seems to be rather ad hoc, and the underlying assumptions on the notion of similarity are not made explicit. A more systematic characterization and validation of tag similarity in terms of formal representations of knowledge is still lacking. Here we address this issue and analyze several measures of tag similarity: Each measure is computed on data from the social bookmarking system del.icio.us and a semantic grounding is provided by mapping pairs of similar tags in the folksonomy to pairs of synsets in Wordnet, where we use validated measures of semantic distance to characterize the semantic relation between the mapped tags. This exposes important features of the investigated similarity measures and indicates which ones are better suited in the context of a given semantic application.}Tag Recommendations in Social Bookmarking Systemshttps://puma.uni-kassel.de/bibtex/2955bcf14f3272ba6eaf3dadbef6c0b10/stummestumme2010-06-29T22:44:43+02:002.0 2008 Recommendations bookmarking itegpub logsonomies myown recommendations recommender social systems tag tagorapub tags web web2.0 web20 <span class="authorEditorList"><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="Leandro Marinho" itemprop="url" href="/author/Leandro%20Marinho"><span itemprop="name">L. Marinho</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="Lars Schmidt-Thieme" itemprop="url" href="/author/Lars%20Schmidt-Thieme"><span itemprop="name">L. Schmidt-Thieme</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>AI Communications</em></span></span> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">21 </span></span>(<span itemprop="issueNumber">4</span>):
<span itemprop="pagination">231-247</span></em> </span>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Tue Jun 29 22:44:43 CEST 2010AmsterdamAI Communications4231-247Tag Recommendations in Social Bookmarking Systems2120082.0 2008 Recommendations bookmarking itegpub logsonomies myown recommendations recommender social systems tag tagorapub tags web web2.0 web20 Collaborative tagging systems allow users to assign keywords - so called "tags" - to resources. Tags are used for navigation, finding resources and serendipitous browsing and thus provide an immediate benefit for users. These systems usually include tag recommendation mechanisms easing the process of finding good tags for a resource, but also consolidating the tag vocabulary across users. In practice, however, only very basic recommendation strategies are applied.
In this paper we evaluate and compare several recommendation algorithms on large-scale real life datasets: an adaptation of
user-based collaborative filtering, a graph-based recommender built on top of the FolkRank algorithm, and simple methods based on counting tag occurences. We show that both FolkRank and Collaborative Filtering provide better results than non-personalized baseline methods. Moreover, since methods based on counting tag occurrences are computationally cheap, and thus usually preferable for real time scenarios, we discuss simple approaches for improving the performance of such methods. We show, how a simple recommender based on counting tags from users and resources can perform almost as good as the best recommender.
Logsonomy - Social Information Retrieval with Logdatahttps://puma.uni-kassel.de/bibtex/2e64d14f3207766f4afc65983fa759ffe/stummestumme2010-05-19T11:55:51+02:002.0 2008 analysis folksonomy information itegpub logsonomy myown network retrieval search social tagorapub web web2.0 web20 <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>)Wed May 19 11:55:51 CEST 2010New York, NY, USAHT '08: Proceedings of the Nineteenth ACM Conference on Hypertext and Hypermedia157--166Logsonomy - Social Information Retrieval with Logdata20082.0 2008 analysis folksonomy information itegpub logsonomy myown network retrieval search social tagorapub web web2.0 web20 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.Discovering Shared Conceptualizations in Folksonomieshttps://puma.uni-kassel.de/bibtex/2eb0bdaeab0aa5d4c528c97e2b10770b9/stummestumme2010-04-07T13:54:41+02:002008 FCA OntologyHandbook analysis bibsonomy concept discovering fca folksonomies formal itegpub l3s myown shared triadic <span class="authorEditorList"><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>, <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>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernhard Ganter" itemprop="url" href="/author/Bernhard%20Ganter"><span itemprop="name">B. Ganter</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>Journal of Web Semantics</em></span></span> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">6 </span></span>(<span itemprop="issueNumber">1</span>):
<span itemprop="pagination">38-53</span></em> </span>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Wed Apr 07 13:54:41 CEST 2010Journal of Web Semantics138-53Discovering Shared Conceptualizations in Folksonomies620082008 FCA OntologyHandbook analysis bibsonomy concept discovering fca folksonomies formal itegpub l3s myown shared triadic A Comparison of Social Bookmarking with Traditional Searchhttps://puma.uni-kassel.de/bibtex/286dbae2e531c7f68592f5780b46b6a70/stummestumme2010-04-07T13:54:41+02:002008 bookmarking comparison folksonomies folksonomy itegpub logsonomies myown search social tagorapub <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="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">Advances in Information Retrieval, 30th European Conference on IR Research, ECIR 2008</span>, </em></span><em>Volume 4956 von LNAI, </em><em>Seite <span itemprop="pagination">101-113</span>. </em><em>Heidelberg, </em><em><span itemprop="publisher">Springer</span>, </em>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Wed Apr 07 13:54:41 CEST 2010HeidelbergAdvances in Information Retrieval, 30th European Conference on IR Research, ECIR 2008101-113LNAIA Comparison of Social Bookmarking with Traditional Search495620082008 bookmarking comparison folksonomies folksonomy itegpub logsonomies myown search social tagorapub Social bookmarking systems allow users to store links to internet resources on a web page. As social bookmarking systems are growing in popularity, search algorithms have been developed that transfer the idea of link-based rankings in the Web to a social bookmarking system’s
data structure. These rankings differ from traditional search engine rankings in that they incorporate the rating of users.
In this study, we compare search in social bookmarking systems with traditionalWeb search. In the first part, we compare the user activity and behaviour in both kinds of systems, as well as the overlap of the underlying sets of URLs. In the second part,we compare graph-based and vector space rankings for social bookmarking systems with commercial search engine rankings.
Our experiments are performed on data of the social bookmarking system Del.icio.us and on rankings and log data from Google, MSN, and AOL. We will show that part of the difference between the systems is due to different behaviour (e. g., the concatenation of multi-word lexems
to single terms in Del.icio.us), and that real-world events may trigger similar behaviour in both kinds of systems. We will also show that a graph-based ranking approach on folksonomies yields results that are closer to the rankings of the commercial search engines than vector space
retrieval, and that the correlation is high in particular for the domains that are well covered by the social bookmarking system.Semantic Analysis of Tag Similarity Measures in Collaborative Tagging Systemshttps://puma.uni-kassel.de/bibtex/23b0aca61b24e4343bd80390614e3066e/stummestumme2010-04-07T13:54:41+02:002.0 2008 collaborative folksonomies folksonomy itegpub myown semantic systems tagging web web2.0 <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ciro Cattuto" itemprop="url" href="/author/Ciro%20Cattuto"><span itemprop="name">C. Cattuto</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="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">Proceedings of the 3rd Workshop on Ontology Learning and Population (OLP3)</span>, </em></span><em>Patras, Greece, </em>(<em><span>Juli 2008<meta content="Juli 2008" itemprop="datePublished"/></span></em>)Wed Apr 07 13:54:41 CEST 2010Patras, GreeceProceedings of the 3rd Workshop on Ontology Learning and Population (OLP3)JulySemantic Analysis of Tag Similarity Measures in Collaborative Tagging Systems20082.0 2008 collaborative folksonomies folksonomy itegpub myown semantic systems tagging web web2.0 Social bookmarking systems allow users to organise collections of resources on the Web in a collaborative fashion. The increasing popularity of these systems as well as first insights into their emergent semantics have made them relevant to disciplines like knowledge extraction and ontology learning. The problem of devising methods to measure the semantic relatedness between tags and characterizing it semantically is still largely open. Here we analyze three measures of tag relatedness: tag co-occurrence, cosine similarity of co-occurrence distributions, and FolkRank, an adaptation of the PageRank algorithm to folksonomies. Each measure is computed on tags from a large-scale dataset crawled from the social bookmarking system del.icio.us. To provide a semantic grounding of our findings, a connection to WordNet (a semantic lexicon for the English language) is established by mapping tags into synonym sets of WordNet, and applying there well-known metrics of semantic similarity. Our results clearly expose different characteristics of the selected measures of relatedness, making them applicable to different subtasks of knowledge extraction such as synonym detection or discovery of concept hierarchies.Publications of Gerd StummeProceedings of the Dagstuhl Seminar on Social Web Communitieshttps://puma.uni-kassel.de/bibtex/23b7c7ecfeb23871fae0e361f16e7f8de/stummestumme2010-04-07T13:54:41+02:002008 communities dagstuhl itegpub myown social tagora tagorapub web <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="editor"><a title="Harith Alani" itemprop="url" href="/author/Harith%20Alani"><span itemprop="name">H. Alani</span></a></span>, <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="editor"><a title="Steffen Staab" itemprop="url" href="/author/Steffen%20Staab"><span itemprop="name">S. Staab</span></a></span>, und <span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="editor"><a title="Gerd Stumme" itemprop="url" href="/author/Gerd%20Stumme"><span itemprop="name">G. Stumme</span></a></span> (Hrsg.).
. </span><em><span itemprop="publisher">Schloss Dagstuhl</span>, </em>(<em><span>September 2008<meta content="September 2008" itemprop="datePublished"/></span></em>)Wed Apr 07 13:54:41 CEST 2010SeptemberProceedings of the Dagstuhl Seminar on Social Web Communities20082008 communities dagstuhl itegpub myown social tagora tagorapub web Publications of Gerd StummeThe Anti-Social Tagger - Detecting Spam in Social Bookmarking Systemshttps://puma.uni-kassel.de/bibtex/26357f535000a383f228f1e8e56ca86ca/stummestumme2010-04-07T13:54:41+02:002.0 2008 bookmarking folksonomies folksonomy itegpub myown social spam systems tagger tagorapub web web2.0 <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="Christoph Schmitz" itemprop="url" href="/author/Christoph%20Schmitz"><span itemprop="name">C. Schmitz</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">Proc. of the Fourth International Workshop on Adversarial Information Retrieval on the Web</span>, </em></span>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Wed Apr 07 13:54:41 CEST 2010Proc. of the Fourth International Workshop on Adversarial Information Retrieval on the WebThe Anti-Social Tagger - Detecting Spam in Social Bookmarking Systems20082.0 2008 bookmarking folksonomies folksonomy itegpub myown social spam systems tagger tagorapub web web2.0 Publications of Gerd StummeLogsonomy -- A Search Engine Folksonomyhttps://puma.uni-kassel.de/bibtex/2359e1eccdc524334d4a2ad51330f76ae/stummestumme2010-04-07T13:54:41+02:002008 engine folksonomies folksonomy itegpub logsonomies logsonomy myown search tagorapub <span class="authorEditorList"><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="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="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">Proceedings of the Second International Conference on Weblogs and Social Media(ICWSM 2008)</span>, </em></span><em><span itemprop="publisher">AAAI Press</span>, </em>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Wed Apr 07 13:54:41 CEST 2010Proceedings of the Second International Conference on Weblogs and Social Media(ICWSM 2008)Logsonomy -- A Search Engine Folksonomy20082008 engine folksonomies folksonomy itegpub logsonomies logsonomy myown search tagorapub In social bookmarking 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.
Search engines filter the vast information of the web.
Queries 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. The clickdata can be represented as a
folksonomy in which queries are descriptions of clicked
URLs. This poster analyzes the topological characteristics
of the resulting tripartite hypergraph of queries,
users and bookmarks of two query logs and compares it
two a snapshot of the folksonomy del.icio.us.Publications of Gerd StummeSemantic Grounding of Tag Relatedness in Social Bookmarking Systemshttps://puma.uni-kassel.de/bibtex/227198c985b3bdb6daab0f7e961b370a9/stummestumme2010-04-07T13:54:41+02:002008 grounding iswc2008 itegpub myown relatedness semantic seminar2009 similarity sw tag tagging tagorapub <span class="authorEditorList"><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ciro Cattuto" itemprop="url" href="/author/Ciro%20Cattuto"><span itemprop="name">C. Cattuto</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="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">The Semantic Web -- ISWC 2008, Proc.Intl. Semantic Web Conference 2008</span>, </em></span><em>Volume 5318 von LNAI, </em><em>Seite <span itemprop="pagination">615--631</span>. </em><em>Heidelberg, </em><em><span itemprop="publisher">Springer</span>, </em>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)Wed Apr 07 13:54:41 CEST 2010HeidelbergThe Semantic Web -- ISWC 2008, Proc.Intl. Semantic Web Conference 2008615--631LNAISemantic Grounding of Tag Relatedness in Social Bookmarking Systems531820082008 grounding iswc2008 itegpub myown relatedness semantic seminar2009 similarity sw tag tagging tagorapub Collaborative tagging systems have nowadays become important data sources for populating semantic web applications. For tasks
like synonym detection and discovery of concept hierarchies, many researchers introduced measures of tag similarity. Eventhough most of these measures appear very natural, their design often seems to be rather ad hoc, and the underlying assumptionson the notion of similarity are not made explicit. A more systematic characterization and validation of tag similarity interms of formal representations of knowledge is still lacking. Here we address this issue and analyze several measures oftag similarity: Each measure is computed on data from the social bookmarking system del.icio.us and a semantic grounding isprovided by mapping pairs of similar tags in the folksonomy to pairs of synsets in Wordnet, where we use validated measuresof semantic distance to characterize the semantic relation between the mapped tags. This exposes important features of theinvestigated similarity measures and indicates which ones are better suited in the context of a given semantic application.Publications of Gerd Stumme