Elena Simperl
Karlsruhe Institute of Technology (KIT), Institut AIFB, Faculty Member
Abstract Since many semantic content creation methods and initiatives have been developed, a fully automatic process cannot be implemented. As a consequence, many application designers are interested in the question of how to motivate... more
Abstract Since many semantic content creation methods and initiatives have been developed, a fully automatic process cannot be implemented. As a consequence, many application designers are interested in the question of how to motivate users to become a part of this endeavor, compensating the limitations of purely machine-driven content creation techniques.
Abstract This report documents the program and the outcomes of Dagstuhl Seminar 12171" Semantic Data Management". The purpose of the seminar was to have a fruitful exchange of ideas between the semantic web, database systems and... more
Abstract This report documents the program and the outcomes of Dagstuhl Seminar 12171" Semantic Data Management". The purpose of the seminar was to have a fruitful exchange of ideas between the semantic web, database systems and information retrieval communities, organised across four main themes: scalability, provenance, dynamicity and search.
Abstract. As Linked Open Data promises to enrich a user's web experience in various ways like having computers read information that is shared by users or by being able to query resources on the web in an advanced way, research puts more... more
Abstract. As Linked Open Data promises to enrich a user's web experience in various ways like having computers read information that is shared by users or by being able to query resources on the web in an advanced way, research puts more and more effort into the development of linking tools. In this paper we summarize several linking tools regarding their most important aspects by applying a template to each of them. This includes a general description for each of the tools as well as technical aspects.
Executive Summary This deliverable defines how the implementation of a distributed Triple Space over widely spread Triple Space kernels is realized. Two different distribution subjects, distribution of Linda/tuplespace systems and... more
Executive Summary This deliverable defines how the implementation of a distributed Triple Space over widely spread Triple Space kernels is realized. Two different distribution subjects, distribution of Linda/tuplespace systems and distribution of semantic web data are described and an evaluation of the most promising approaches together with a proposal for the implementation is provided in this deliverable.
Abstract. Various tasks in publishing and maintaining Linked Data require human contribution at several ends. In this paper, we discuss the role of human intelligence in data interlinking. This justifies the necessity of incentive models,... more
Abstract. Various tasks in publishing and maintaining Linked Data require human contribution at several ends. In this paper, we discuss the role of human intelligence in data interlinking. This justifies the necessity of incentive models, motivation mechanisms, and applying the paradigm of human computation to the interlinking process. To conclude, we give examples for using human computation for interlinking by summarizing “games with a purpose” that address tasks in data interlinking.
ABSTRACT There are queries in Linked Data processing that cannot always be optimally answered through traditional data base management techniques. More often than not answering such queries relies on information that is incomplete,... more
ABSTRACT There are queries in Linked Data processing that cannot always be optimally answered through traditional data base management techniques. More often than not answering such queries relies on information that is incomplete, incorrect, or fuzzily specified; and on mere approximations of computationally advanced functionality for matching, aggregating, and ranking such information.
ABSTRACT Increasing amounts of structured data are exposed on the Web using graph-based representation models and protocols such as RDF and SPARQL.
RDF-Interpretationen formte Literale auf Literalwerte (also Elemente aus LV) abgebildet werden, nicht wohlgeformte jedoch auf Ressourcen, die keine Literalwerte sind. Eine RDF-Interpretation für ein Vokabular V ist nun eine einfache... more
RDF-Interpretationen formte Literale auf Literalwerte (also Elemente aus LV) abgebildet werden, nicht wohlgeformte jedoch auf Ressourcen, die keine Literalwerte sind. Eine RDF-Interpretation für ein Vokabular V ist nun eine einfache Interpretation für das Vokabular V∪ VRDF, welche zusätzlich folgende Bedingungen erfüllt: x∈ IP genau dann, wenn〈 x, rdf: PropertyI〉∈ IEXT (rdf: typeI).
Abstract Linked Data refers to a set of guidelines and best practices for publishing and accessing structured data on the Web. It builds upon established Web technologies, in particular HTTP and URIs, extended with Semantic Web... more
Abstract Linked Data refers to a set of guidelines and best practices for publishing and accessing structured data on the Web. It builds upon established Web technologies, in particular HTTP and URIs, extended with Semantic Web representation formats and protocols such as RDF, RDFS, OWL and SPARQL, by which data from different sources can be shared, interconnected and used beyond the application scenarios for which it was originally created. RDF is a central building block of the Linked Data technology stack.
Entities on the Web of Data need to have labels in order to be exposable to humans in a meaningful way. These labels can then be used for exploring the data, ie, for displaying the entities in a linked data browser or other front-end... more
Entities on the Web of Data need to have labels in order to be exposable to humans in a meaningful way. These labels can then be used for exploring the data, ie, for displaying the entities in a linked data browser or other front-end applications, but also to support keyword-based or natural-language based search over the Web of Data. Far too many applications fall back to exposing the URIs of the entities to the user in the absence of more easily understandable representations such as human-readable labels.
ABSTRACT The Semantic Business Process Management (SPBM) approach from the SUPER project utilizes a Semantic Execution Environment (SEE) for the automatic discovery, composition, mediation, and invocation of Web services. In order to... more
ABSTRACT The Semantic Business Process Management (SPBM) approach from the SUPER project utilizes a Semantic Execution Environment (SEE) for the automatic discovery, composition, mediation, and invocation of Web services. In order to enable the Semantic Execution Environment, an engineer must create semantic descriptions of functional, nonfunctional, and behavioural aspects of Web services and enduser requirements.
Abstract Over 80% of entities on the Semantic Web lack a human-readable label. This hampers the ability of any tool that uses linked data to offer a meaningful interface to human users. We argue that methods for deriving human-readable... more
Abstract Over 80% of entities on the Semantic Web lack a human-readable label. This hampers the ability of any tool that uses linked data to offer a meaningful interface to human users. We argue that methods for deriving human-readable labels are essential in order to allow the usage of the Web of Data. In this paper we explore, implement, and evaluate a method for deriving human-readable labels based on the variable names used in a large corpus of SPARQL queries that we built from a set of log files.
Abstract. Much research has been done to combine the fields of Databases and Natural Language Processing. While many works focus on the problem of deriving a structured query for a given natural language question, the problem of query... more
Abstract. Much research has been done to combine the fields of Databases and Natural Language Processing. While many works focus on the problem of deriving a structured query for a given natural language question, the problem of query verbalization–translating a structured query into natural language–is less explored. In this work we describe our approach to verbalizing SPARQL queries in order to create natural language expressions that are readable and understandable by the human day-to-day user.
Abstract. The concept of Economic Traffic Management (ETM) encompasses various techniques for optimizing overlay networks considering both, underlay and overlay networks' performance requirements as well as the resulting economic... more
Abstract. The concept of Economic Traffic Management (ETM) encompasses various techniques for optimizing overlay networks considering both, underlay and overlay networks' performance requirements as well as the resulting economic implications for ISPs.
The technical challenges associated with the development and deployment of ontologies have been subject to a considerable number of research initiatives since the beginning of the nineties. The economical aspects of these processes are,... more
The technical challenges associated with the development and deployment of ontologies have been subject to a considerable number of research initiatives since the beginning of the nineties. The economical aspects of these processes are, however, still poorly exploited, impeding the dissemination of ontology-driven technologies beyond the boundaries of the academic community.
Abstract Wikipedia is commonly used as a proving ground for research in collaborative systems. This is likely due to its popularity and scale, but also to the fact that large amounts of data about its formation and evolution are freely... more
Abstract Wikipedia is commonly used as a proving ground for research in collaborative systems. This is likely due to its popularity and scale, but also to the fact that large amounts of data about its formation and evolution are freely available to inform and validate theories and models of online collaboration.
Abstract. Many people dedicate their free time with playing games or following game related activities. The Casual Games Market Report 2007 [3] names games with more than 300 million downloads. Moreover, the Casual Games Association... more
Abstract. Many people dedicate their free time with playing games or following game related activities. The Casual Games Market Report 2007 [3] names games with more than 300 million downloads. Moreover, the Casual Games Association reports more than 200 million casual gamers worldwide [4]. People play them for various reasons, such as to relax, to be entertained, for the need of competition and to be thrilled [9]. Additionally they want to be challenged, mentally as well skill based.
Abstract As traditional process elicitation methods are expensive and time consuming, a trend toward collaborative, user-centric, on-line business process modeling can be observed. A common proposal in this area is the use of a semantic... more
Abstract As traditional process elicitation methods are expensive and time consuming, a trend toward collaborative, user-centric, on-line business process modeling can be observed. A common proposal in this area is the use of a semantic wiki-based light-weight knowledge capturing tool for collaborative process development. Although different frameworks have been proposed, nobody has compared the systems against existing requirements for collaborative maturing of processes.
Abstract This report documents the program and the outcomes of Dagstuhl Seminar 12171 “Semantic Data Management”. The purpose of the seminar was to have a fruitful exchange of ideas between the semantic web, database systems and... more
Abstract This report documents the program and the outcomes of Dagstuhl Seminar 12171 “Semantic Data Management”. The purpose of the seminar was to have a fruitful exchange of ideas between the semantic web, database systems and information retrieval communities, organised across four main themes: scalability, provenance, dynamicity and search.
This peer-reviewed book contains papers describing the major scientific achievements supported by European funding in the area of Future Internet. It is published in the context of FIA, the Future Internet Assembly, which is structured to... more
This peer-reviewed book contains papers describing the major scientific achievements supported by European funding in the area of Future Internet. It is published in the context of FIA, the Future Internet Assembly, which is structured to permit interactions across technical domains from researchers and other stakeholders active in Future Internet research. FIA holds two meetings per year and calls on those involved in relevant funded research projects to participate actively and to steer its work.
Abstract The Semantic Business Process Management (SPBM) approach from the SUPER project utilizes a Semantic Execution Environment (SEE) for the automatic discovery, composition, mediation, and invocation of Web services. In order to... more
Abstract The Semantic Business Process Management (SPBM) approach from the SUPER project utilizes a Semantic Execution Environment (SEE) for the automatic discovery, composition, mediation, and invocation of Web services. In order to enable the Semantic Execution Environment, an engineer must create semantic descriptions of functional, nonfunctional, and behavioural aspects of Web services and enduser requirements.
Knowledge workers are central to an organisation's success, yet the tools they must use often stand in the way of maximising their productivity. The research described here, which is being undertaken as a part of ACTIVE, an EU-funded... more
Knowledge workers are central to an organisation's success, yet the tools they must use often stand in the way of maximising their productivity. The research described here, which is being undertaken as a part of ACTIVE, an EU-funded collaborative research project that will run until February 2011, seeks to remedy some of the defects of current knowledge worker tools. It addresses the need for greater knowledge worker productivity by providing more effective and efficient tools. Three themes drive our research.
Abstract: Social software has proven valuable in enterprises for collaborative knowledge management. In order to introduce a wiki in the enterprise, we propose a solution that combines Web 2.0 and Semantic Web technologies. We describe... more
Abstract: Social software has proven valuable in enterprises for collaborative knowledge management. In order to introduce a wiki in the enterprise, we propose a solution that combines Web 2.0 and Semantic Web technologies. We describe how this solution resolves the technical challenges, beyond that, opens up new opportunities, and, also, how it can be realized in a concrete enterprise scenario.
Abstract. Information on the Web includes a huge diversity of opinions, viewpoints, sentiments, emotions, and biases. Accordingly, more and more methods, techniques and tools are available to extract these semantics from text.... more
Abstract. Information on the Web includes a huge diversity of opinions, viewpoints, sentiments, emotions, and biases. Accordingly, more and more methods, techniques and tools are available to extract these semantics from text. Representation and exchange of diversity-related information can be easily supported by the use of semantic technologies. For this, we introduce the Knowledge Diversity Ontology (KDO).
Abstract. Techniques for reliably estimating development efforts are a fundamental requirement for a wide-scale dissemination of ontologies in real-world application settings. The parametric cost estimation model ONTOCOM is a first... more
Abstract. Techniques for reliably estimating development efforts are a fundamental requirement for a wide-scale dissemination of ontologies in real-world application settings. The parametric cost estimation model ONTOCOM is a first attempt to cope with the lack of instruments for business measurements in the field of ontology engineering. This paper is intended as a user guide to ONTOCOM.
Abstract. Many aspects of Linked Data management–including exposing legacy data and applications to semantic formats, designing vocabularies to describe RDF data, identifying links between entities, query processing, and data curation–are... more
Abstract. Many aspects of Linked Data management–including exposing legacy data and applications to semantic formats, designing vocabularies to describe RDF data, identifying links between entities, query processing, and data curation–are necessarily tackled through the combination of human effort with algorithmic techniques. In the literature on traditional data management the theoretical and technical groundwork to realize and manage such combinations is being established.
Executive Summary The main assumption taken in LarKC is that a distributed Semantic Web reasoning infrastructure has to go beyond current reasoning paradigms that are strictly based on logic in order to scale to the size of the current... more
Executive Summary The main assumption taken in LarKC is that a distributed Semantic Web reasoning infrastructure has to go beyond current reasoning paradigms that are strictly based on logic in order to scale to the size of the current and future Web. In LarKC this paradigm shift will be obtained by fusing reasoning (in the sense of logic) with search (in the sense of information retrieval), and taking seriously the notion of limited rationality (in the sense of Herbert Simon).
Abstract DiversiWeb 2011, the First International Workshop on Knowledge Diversity on the Web, co-located with WWW2011 in Hyderabad, India, provided an interdisciplinary forum for researchers and practitioners to present and discuss their... more
Abstract DiversiWeb 2011, the First International Workshop on Knowledge Diversity on the Web, co-located with WWW2011 in Hyderabad, India, provided an interdisciplinary forum for researchers and practitioners to present and discuss their ideas related to the challenges posed by diversity on the Web.
Abstract: This paper describes practical lessons learned in the project Knowledge Nets which examines the technological feasibility of the upcoming Semantic Web and the business implications of using these technologies in specific market... more
Abstract: This paper describes practical lessons learned in the project Knowledge Nets which examines the technological feasibility of the upcoming Semantic Web and the business implications of using these technologies in specific market sectors.
Abstract Many problems in knowledge acquisition, such as image labeling, still rely on extensive human input and intervention. In order to attract people to invest the necessary time into such tasks, rewarding incentives and motivation... more
Abstract Many problems in knowledge acquisition, such as image labeling, still rely on extensive human input and intervention. In order to attract people to invest the necessary time into such tasks, rewarding incentives and motivation mechanisms have been employed. While recruting" human cycles" for such tasks is difficult, online games manage to attract plenty of attention (due to the fact that they provide inherent incentives, such as fun and competition).
Abstract. The last decade of research in ontology alignment has brought a variety of computational techniques to discover correspondences between ontologies. While the accuracy of automatic approaches has continuously improved, human... more
Abstract. The last decade of research in ontology alignment has brought a variety of computational techniques to discover correspondences between ontologies. While the accuracy of automatic approaches has continuously improved, human contributions remain a key ingredient of the process: this input serves as a valuable source of domain knowledge that is used to train the algorithms and to validate and augment automatically computed alignments.
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The World Wide Web is one of the ground-breaking achievements of modern computer science. The core tech-nology, so simple to use, allows billions of users to publish, share and consume information from all over the world. The addition of... more
The World Wide Web is one of the ground-breaking achievements of modern computer science. The core tech-nology, so simple to use, allows billions of users to publish, share and consume information from all over the world. The addition of so-called Web services that ...
Research Interests:
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Abstract. The technical challenges associated with the development and deployment of ontologies have been subject to a number of research initiatives since the beginning of the nineties. By comparison the eco-nomics of ontology... more
Abstract. The technical challenges associated with the development and deployment of ontologies have been subject to a number of research initiatives since the beginning of the nineties. By comparison the eco-nomics of ontology engineering remains a poorly exploited field, this ...