Claus Stadler, Lisa Wenige, Sebastian Tramp, Kurt Junghanns, and Michael Martin: In: Proceedings of the Posters and Demos Track of the 14th International Conference on Semantic Systems co-located with the 14th International Conference on Semantic Systems (SEMANTICS'19) Open Data portals often struggle to provide release features (i.e., stable versioning, up-to-date download links, rich metadata descritions) 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 there exists a variety of tools to efficiently control release processes in software development, the management of dataset releases is not as clear. This paper proposes a deployment pipeline for efficient dataset releases that is based on automated enrichment of DCAT/DATAID metadata and is a first step towards efficient deployment pipelining for Open Data publishing. link

Marvin Frommhold, Natanael Arndt, Sebastian Tramp, and Niklas Petersen: In: Proceedings of the Workshop on Linked Data on the Web co-located with the 25th International World Wide Web Conference (WWW 2016) 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 participants of the network can clone and subscribe to. Subscribers get notified as soon as new information becomes available. This provides a technical infrastructure for business communication acts such as supply chain communication or master data management. In addition to the conceptual analysis, we provide an implementation enabling companies to create such dynamic semantic value networks. link

Niklas Petersen, Irlan Grangel-Gonzalez, Gokhan Coskun, Sören Auer, Marvin Frommhold, Sebastian Tramp, and Maxime LeFrancois: In: Proceedings of the 10th International Conference on Semantic Computing; Laguna Hills, California; February 3-5 2016 link

Niklas Petersen, Christoph Lange, Sören Auer, Marvin Frommhold, and Sebastian Tramp: In: Proceedings of the 19th International Conference on Business Information Systems 6-8 July 2016, Leipzig, Germany 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 along the supply chain between and within enterprises is required. However, less efficient human communication is often used instead of automatic systems because of the great diversity of enterprise systems and models. This paper describes an approach and its implementation SCM Intelligence App, which enables the configuration of individual supply chains together with the execution of industry accepted performance metrics. Based on machine-processable supply chain data model (the SCORVoc RDF vocabulary implementing the SCOR standard) and W3C standardized protocols such as SPARQL, the approach represents an alternative to closed software systems, which lack support for inter-organizational supply chain analysis. Finally, we demonstrate the practicality of our approach using a prototypical implementation and a test scenario. link

Marvin Frommhold, Rubén Navarro Piris, Natanael Arndt, Sebastian Tramp, Niklas Petersen, and Michael Martin: In: 12th International Conference on Semantic Systems Proceedings (SEMANTiCS 2016) 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 introduce an RDF versioning approach as a foundation for a full featured RDF Version Control System. We argue that such a system needs support for all concepts of the RDF specification including support for RDF datasets and blank nodes. Furthermore, we placed special emphasis on the protection against unperceived history manipulation by hashing the resulting patches. In addition to the conceptual analysis and an RDF vocabulary for representing versioning information, we present a mature implementation which captures versioning information for changes to arbitrary RDF datasets. link

Sebastian Tramp, Rubén Navarro Piris, Timofey Ermilov, Niklas Petersen, Marvin Frommhold, and Sören Auer: In: The Semantic Web: ESWC 2015 Satellite Events - ESWC 2015 Satellite Events Portoroz, Slovenia, May 31 - June 4, 2015, Revised Selected Papers link

Philipp Frischmuth, Michael Martin, Sebastian Tramp, Thomas Riechert, and Sören Auer: In: Semantic Web Journal link

Georgi Chaladze, Stefan Otto, and Sebastian Tramp: In: Journal of Insect Conservation 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 471 spider species to visualize the diversity distribution of spider species in this region. Overall species diversity was highest in mountain forests of the North Caucasus, east-central Georgia, the southern slopes of the eastern Great Caucasus and south-east Azerbaijan. A regression tree analysis Chi squared automatic interaction detector method revealed the mean temperature of the driest quarter and precipitation parameters to be the main environmental factors shaping these patterns. Diversity of endemic species was correlated with overall species diversity but hotspots of endemic species (10+ percent of all species) exists in high-mountain areas, suggesting post-glacial speciation events in the high mountains as the main sources of high endemism in Caucasus. Further information on the spatial distribution of species diversity of invertebrate taxa in the Caucasus Ecoregion is needed to improve conservation efforts in this biodiversity hotspot. link

Sebastian Tramp: , Note: http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-154844 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 opportunity to communicate easily with users on other islands and continents or even to relocate trans-continentally. In addition to that, privacy, data ownership and freedom of communication issues are problematically in centralized environments. The idea of distributed social networking enables users to overcome the drawbacks of centralized social networks. The goal of this thesis is to provide an architecture for distributed social networking based on semantic technologies. This architecture consists of semantic artifacts, protocols and services which enable social network applications to work in a distributed environment and with semantic interoperability. Furthermore, this thesis presents applications for distributed semantic social networking and discusses user interfaces, architecture and communication strategies for this application category. link

In: Linked Open Data (Editors: Sören Auer, Volha Bryl, and Sebastian Tramp) link