Sebastian Tramp

eccenca GmbH · Leipzig

Over the last decades the Web has evolved from a human-human communication network to a network of complex human-machine interactions. An increasing amount of data is available as Linked Data which allows machines to "understand" the data, but RDF is not meant to be understood by humans. With Jekyll RDF we present a method to close the gap between...

The International Data Spaces initiative (IDS) is building an ecosystem to facilitate data exchange in a secure, trusted, and semantically interoperable way. It aims at providing a basis for smart services and cross-company business processes, while at the same time guaranteeing data owners’ sovereignty over their content. The IDS Information Model...

To create innovative connected products and services, more and more interdisciplinary development efforts across industries covering hardware, software and business model design are required. One example for this is smart textiles, where the complexity of the value chain has so far hindered the successful market launch of new products. In this pape...

Open Data portals often struggle to provide release features (i.e., stable versioning, up-to-date download links, rich metadata descriptions) for their datasets. By this means, wide adoption of publicly available datasets is hindered, since consuming applications cannot access fresh data sources or might break due to data quality issues. While ther...

Over the last decades the Web has evolved from a human–human communication network to a network of complex human–machine interactions. An increasing amount of data is available as Linked Data which allows machines to “understand” the data, but RDF is not meant to be understood by humans. With Jekyll RDF we present a method to close the gap between...

Coherent and consistent tracking of provenance data and in particular update history information is a crucial building block for any serious information system architecture. Version Control Systems can be a part of such an architecture enabling users to query and manipulate versioning information as well as content revisions. In this paper, we intr...

Supply Chain Management aims at optimizing the flow of goods and services from the producer to the consumer. Closely interconnected enterprises that align their production, logistics and procurement with one another thus enjoy a competitive advantage in the market. To achieve a close alignment, an instant, robust and efficient information flow alon...

Sharing information securely between business partners and managing large supply chains efficiently will be a crucial competitive advantage for enterprises in the near future. In this paper, we present a concept that allows for building value networks between business partners in a distributed manner. Companies are able to publish Linked Data which...

Advanced, highly specialized economies require instant , robust and efficient information flows within its value-added and Supply Chain networks. Especially also in the context of the recent Industry 4.0, smart manufacturing or cyber-physical systems initiatives more efficient and effective information exchange in supply networks is of paramount im...

With the LUCID Endpoint, we demonstrate how companies can utilize Linked Data technology to provide major data items for their business partners in a timely manner, machine readable and with open and extensible schemata. The main idea is to provide a Linked Data infrastructure which enables all partners to fetch, as well as to clone and to synchron...

Die visuelle Aufbereitung von Linked Data sowohl für Zwecke der Prozessverarbeitung als auch zur Konsumierung durch Endanwender ist ein wichtiges Designelement in der unternehmerischen Aneignung von Semantic Web Technologien. Der Beitrag stellt aktuelle Ansätze in der Linked Data-Visualisierung vor, diskutiert deren Bedeutung im Enterprise Informat...

Online social networking has become one of the most popular services on the Web. Especially Facebook with its 845Mio+ monthly active users and 100Mrd+ friendship relations creates a Web inside the Web. Drawing on the metaphor of islands, Facebook is becoming more like a continent. However, users are locked up on this continent with hardly any oppor...

We present Xodx (http://aksw.org/Projects/Xodx) an implementation of a node for the Distributed Semantic Social Network (DSSN). DSSN is a general architecture for building an online social network using Semantic Web standards and additional protocols for real-time communication such as Semantic Pingback and PubSubHubbub. Xodx provides functionality...

The core of a Linked Data application is the processing of the knowledge expressed as Linked Data. Therefore the creation, man-agement, curation and publication of Linked Data are critical aspects for an application's success. For all of these aspects the LOD2 project provides components. These components have been collected and placed under one di...

Precise information on spatial patterns of species richness and endemic species distribution is important for effective species conservation. In the Caucasus Ecoregion such information is virtually non-existent for invertebrate taxa. Using occurrence data from a large database we calculated species distribution models with the GARP algorithm for 47...

OntoWiki is a front-end application for the Semantic Data Web, which was originally developed to support distributed knowledge engineering scenarios. Due to its extensibility it also serves as an development framework for knowledge intensive applications. On the surface, OntoWiki is a generic user interface for arbitrary RDF knowledge graphs. It su...

This is the most recent database update (10 Oct. 2013), the basis of most information on http://caucasus-spiders.info/. It includes 10997 original records, 41634 cited records of 3072 species (1107 species in the Caucasus Ecoregion) based on the occurence data of 241 publications.

Data integration in large enterprises is a crucial but at the same time costly, long lasting and challenging problem. In the last decade, the prevalent data integration approaches were primarily based on XML, Web Services and Service Oriented Architectures (SOA). We argue that classic SOA architectures may be well-suited for transaction processing,...

The LOD2 Stack is an integrated distribution of aligned tools which support the whole life cycle of Linked Data from extraction, authoring/creation via enrichment, interlinking, fusing to maintenance. The LOD2 Stack comprises new and substantially extended existing tools from the LOD2 project partners and third parties. The stack is designed to be...

Online social networking has become one of the most popular services on the Web. However, current social networks are like walled gardens in which users do not have full control over their data, are bound to specific usage terms of the social network operator and suffer from a lock-in effect due to the lack of interoperability and standards complia...

The WebID protocol enables the global identification and authentication of agents in a distributed manner by combining asym-metric cryptography and Linked Data. In order to decide whether access should be granted or denied to a particular WebID, the authenticating web server may need to retrieve other profiles and linked resources to work out if th...

Despite the success of the emerging Linked Data Web, offering content in a machine-processable way and -- at the same time -- as a traditional Web site is still not a trivial task. In this paper, we present the OntoWiki-CMS - an extension to the collaborative knowledge engineering toolkit OntoWiki for managing semantically enriched Web content. Ont...

Smartphones, which contain a large number of sensors and integrated devices, are becoming increasingly powerful and fully featured computing platforms in our pockets. For many people they already replace the computer as their window to the Internet, to the Web as well as to social networks. Hence, the management and presentation of information abou...

As comparatively powerful mobile computing devices are becoming more common, mobile web applications have started gaining in popularity. In this paper we present an approach for a mobile semantic collaboration platform based on the OntoWiki framework. It allows users to collect instance data, refine the structure of knowledge bases and browse data...

AbstractWhile the number of knowledge bases in the Semantic Web increases, the maintenance and creation of ontology schemata still remain a challenge. In particular creating class expressions constitutes one of the more demanding aspects of ontology engineering. In this article we describe how to adapt a semi-automatic method for learning OWL class...

Smartphones, which contain a large number of sensors and integrated devices, are becoming increasingly powerful and fully featured computing platforms in our pockets. For many people they already replace the computer as their window to the Internet, to the Web as well as to social networks. Hence, the management and presentation of information abou...

Online social networking has become one of the most popular services on the Web. However, current social networks are like walled gardens in which users do not have full control over their data, are bound to speci�c usage terms of the social network operator and suffer from a lock-in effect due to the lack of interoperability and standards complian...

Although the Internet, as an ubiquitous medium for communication, publication and research, already significantly influenced the way historians work, the capabilities of the Web as a direct medium for collaboration in historic research are not much explored. We report about the application of an adaptive, semantics-based knowledge engineering appro...

Facilitating the seamless evolution of RDF knowledge bases on the Semantic Web presents still a major challenge. In this work we devise EvoPat – a pattern-based approach for the evolution and refactoring of knowledge bases. The approach is based on the definition of basic evolution patterns, which are represented declaratively and can capture simpl...

In this paper we present RDFauthor, an approach for authoring information that adheres to the RDF data model. RDFauthor completely hides syntax as well as RDF and ontology data model difficulties from end users and allows to edit information on arbitrary RDFa-annotated web pages. RDFauthor extends RDFa with representations for provenance and update...

In our demonstration (with supportive poster) we want to present the Semantic Wiki application OntoWiki, which is an extensible tool for managing structured information in a collaborative, web-based environment. OntoWiki provides sophisticated means for navigating, visualising and author-ing of RDF-based Knowledge Bases. It serves and consumes Link...

In this paper we present RDFauthor, an approach for au- thoring information adhering to the RDF data model. RDFauthor com- pletely hides syntax as well as RDF and ontology data model dicul- ties from end-users and allows to edit information on arbitrary RDFa annotated web pages. RDFauthor extends RDFa with representations for provenance and update...

Recently, the publishing of structured, semantic information as linked data has gained quite some momentum. For ordinary users on the Internet, however, this information is not yet very visible and (re-) usable. With LESS we present an end-to-end approach for the syndication and use of linked data based on the definition of templates for linked dat...

The success of the Semantic Web in research, technology and standardization communities has resulted in a large variety of different approaches, standards and techniques. This diversity and heterogeneity often involve an increasing difficulty of becoming acquainted with Semantic Web technologies. In this work, we present the SPARQLTrainer approach...

Although the Internet, as an ubiquitous medium for communication, publication and research, already significantly influenced the way historians work, the capabilities of the Web as a direct medium for collaboration in historic research are not much explored. We report about the application of an adaptive, semantics-based knowledge engineering appro...

In this paper we tackle some pressing obstacles of the emerging Linked Data Web, namely the quality, timeliness and coherence of data, which are prerequisites in order to provide direct end user benefits. We present an approach for complementing the Linked Data Web with a social dimension by extending the well-known Pingback mechanism, which is a t...

Zusammenfassung In diesem Beitrag zeigen wir, wie auf Basis einfach zu implementierender Kommunikations-Technologien, wie Linked Data und Pingback, ein soziales Semantisches Web aufgebaut werden kann. Wir erläutern dies an wichtigen Aktivitätsmustern für Social Networks und stellen unsere Implementierung vor, welche in das Semantische Daten-Wiki On...

In this paper, we introduce the OntoWiki Application Framework for developing Semantic Web applications with a strong emphasis on collaboration. After presenting OntoWiki as our main show case for the framework, we give both an architectural overview and a detailed view on the included components.We conclude this paper with a presentation of differ...

In this paper we present Triplify { a simplistic but eective approach to publish Linked Data from relational databases. Triplify is based on mapping HTTP-URI requests onto re- lational database queries. Triplify transforms the result- ing relations into RDF statements and publishes the data on the Web in various RDF serializations, in particular as...

Instant Messaging is in addition to Web and Email the most popular service on the Internet. With xOperator we demonstrate the implementation of a strategy which deeply integrates Instant Messaging networks with the Semantic Web. The xOperator concept is based on the idea of creating an overlay network of collaborative information agents on top of s...

Instant Messaging (IM) is in addition to Web and Email the most popular service on the Internet. With xOperator we present a strategy and implementation which deeply integrates Instant Messaging networks with the Semantic Web. The xOperator concept is based on the idea of creating an overlay network of collaborative information agents on top of soc...

This paper presents an integrated approach of basing requirements engineering on semantic technologies. First, the general approach of semantifying requirements and the underlying ontology are introduced. Second, tools that support requirements elicitation, development, analysis, and exchange on the basis of the semantic foundation are described.

We present OntoWiki, a tool providing support for agile, distributed knowledge engineering scenarios. OntoWiki facilitates the visual presentation of a knowledge base as an information map, with different views on instance data. It enables intuitive authoring of semantic content, with an inline editing mode for editing RDF content, similar to WYSIW...

In diesem Papier präsentieren wir das browserbasierte Werkzeug OntoWi- ki, welches kolloboratives und agiles Wissensmanagement nach Art eines Wikis un- terstützt. Die vom OntoWiki verwalteten Wissensbasen lassen sich sowohl in einer Vielzahl von Sichten erkunden und betrachten, als auch mit mehreren intiutiven Me- thoden bearbeiten. So ist OntoWiki...

Lightweight Directory Access Protocol (LDAP) has gained importance as a database technology for the storage and retrieval of information on network and human resources. This paper describes a method to create RDF models from a directory information tree or an LDAP search query by mapping LDAP schema information into OWL ontologies and LDAP objects...

RDF triple stores are used to store and query large RDF models. Semantic Web applications built on top of such triple stores re-quire methods allowing high-performance access control not restricted to per model directives. For the growing number of lightweight, scripted Semantic Web applications it is crucial to rely on access control methods which...

As more and more websites start to embed RDFa content in their web application view, the need arises to provide a more extensive way for viewing and editing this semantic content independently from the remainder of the application. We present a JavaScript API that allows the independent creation of editing widgets for embedded RDFa, which adds a ne...