Sven Groppe, and Jinghua Groppe,
External sorting for index construction of large semantic web databases, in Proceedings of the 2010 ACM Symposium on Applied Computing (SAC), Sierre, Switzerland , 2010. pp. 1373--1380.

DOI:	10.1145/1774088.1774382
File:	1774088.1774382

Nils Hoeller, Christoph Reinke, Jana Neumann, Sven Groppe, Martin Lipphardt, Björn Schütt, and Volker Linnemann,
Stream-Based XML Template Compression for Wireless Sensor Network Data Management, in 4th International Conference on Multimedia and Ubiquitous Engineering (MUE), Cebu, Philippines , 2010. pp. 1--9.

DOI:	10.1109/MUE.2010.5575094
File:	MUE.2010.5575094

Sven Groppe, Jana Neumann, and Volker Linnemann,
SWOBE - embedding the semantic web languages RDF, SPARQL and SPARUL into java for guaranteeing type safety, for checking the satisfiability of queries and for the determination of query result types, in Proceedings of the 2009 ACM Symposium on Applied Computing (SAC), Honolulu, Hawaii, USA , 2009. pp. 1239--1246.

DOI:	10.1145/1529282.1529561
File:	1529282.1529561

Sven Groppe, Jinghua Groppe, Stefan Böttcher, Thomas Wycisk, and Le Gruenwald,
Optimizing the execution of XSLT stylesheets for querying transformed XML data, Knowl. Inf. Syst. , vol. 18, no. 3, pp. 331--391, 2009.

DOI:	10.1007/s10115-008-0144-4
File:	s10115-008-0144-4

Nils Hoeller, Christoph Reinke, Jana Neumann, Sven Groppe, Christian Werner, and Volker Linnemann,
Towards energy efficient XPath evaluation in wireless sensor networks, in Proceedings of the 6th Workshop on Data Management for Sensor Networks, in conjunction with VLDB (DMSN), Lyon, France , 2009.

DOI:	10.1145/1594187.1594193
File:	1594187.1594193

Nils Hoeller, Christoph Reinke, Jana Neumann, Sven Groppe, Christian Werner, and Volker Linnemann,
XML data management and XPath evaluation in wireless sensor networks, in The 7th International Conference on Advances in Mobile Computing and Multimedia (MoMM), Kuala Lumpur, Malaysia , 2009. pp. 218--230.

DOI:	10.1145/1821748.1821790
File:	1821748.1821790

Sven Groppe, Jinghua Groppe, and Dirk Müller,
Result Merging Technique for Answering XPath Query over {XSLT} Transformed Data, IEEE Trans. Knowl. Data Eng. , vol. 21, no. 9, pp. 1328--1342, 2009.

DOI:	10.1109/TKDE.2008.211
File:	TKDE.2008.211

Jinghua Groppe, Sven Groppe, Sebastian Ebers, and Volker Linnemann,
Efficient processing of SPARQL joins in memory by dynamically restricting triple patterns, in Proceedings of the 2009 ACM Symposium on Applied Computing (SAC), Honolulu, Hawaii, USA , 2009. pp. 1231--1238.

DOI:	10.1145/1529282.1529560
File:	1529282.1529560

Jinghua Groppe, Sven Groppe, and Jan Kolbaum,
Optimization of SPARQL by using coreSPARQL, in Proceedings of the 11th International Conference on Enterprise Information Systems (ICEIS), Milan, Italy , 2009. pp. 107--112.

Dana Linnepe, Sven Groppe, and Josef Ingenerf,
Nutzung von MEDLINE und MeSH für das Benchmarking von RDF-Speichersystemen, in 54. gmds-Jahrestagung - Deutsche Gesellschaft für Medizinische Informatik, Biometrie und Epidemiologie e.V., Essen, Germany , 2009.

File:

09gmds320

Jinghua Groppe, Sven Groppe, Andreas Schleifer, and Volker Linnemann,
LuposDate: a semantic web database system, in Proceedings of the 18th ACM Conference on Information and Knowledge Management (CIKM), Hong Kong, China , 2009. pp. 2083--2084.

DOI:	10.1145/1645953.1646313
File:	1645953.1646313

Christoph Reinke, Nils Hoeller, Jana Neumann, Sven Groppe, Volker Linnemann, and Martin Lipphardt,
Integrating standardized transaction protocols in service-oriented wireless sensor networks, in Proceedings of the 2009 ACM Symposium on Applied Computing (SAC), Honolulu, Hawaii, USA , 2009. pp. 2202--2203.

DOI:	10.1145/1529282.1529768
File:	1529282.1529768

Sven Groppe, and Jinghua Groppe,
Data Mining and Management, Lawrence I. Spendler, Eds. Nova Science Publishers, 2009.

Sven Groppe, Jinghua Groppe, Christoph Reinke, Nils Hoeller, and Volker Linnemann,
Open and novel issues in XML database applications: future directions and advanced technologies, Eric Pardede, Eds. IGI Global, 2009.

Jinghua Groppe, and Sven Groppe,
Filtering unsatisfiable XPath queries, Data & Knowledge Engineering , vol. 64, no. 1, pp. 134--169, 2008. Elsevier B. V..

DOI:

http://dx.doi.org/10.1016/j.datak.2007.06.018

Bibtex:

@Article{GrGr08, author = {Jinghua Groppe and Sven Groppe}, title = {{Filtering unsatisfiable XPath queries}}, journal = {Data & Knowledge Engineering}, volume = {64}, number = {1}, year = {2008}, month = {January}, pages = {134--169}, publisher = {Elsevier B. V.}, address = {Amsterdam, The Netherlands, The Netherlands}, doi = {http://dx.doi.org/10.1016/j.datak.2007.06.018}, issn = {0169-023X}, bibsource = {IFIS, Universit{\"a}t zu L{\"u}beck}, copyright = {Elsevier}, note = {special issue with selected papers from the 8th International Conference on Enterprise Information Systems (ICEIS’ 2006)} }

Nils Hoeller, Christoph Reinke, Sven Groppe, and Volker Linnemann,
Xobe Sensor Networks: Integrating XML in sensor network programming, in Proceedings of the 5th International Conference on Networked Sensing Systems (INSS), Kanazawa, Japan , Kanazawa, Japan , 2008.

File:	INSS.2008.4610868
Bibtex:	@inproceedings{HoReGrLi08, author = "Nils Hoeller, Christoph Reinke, Sven Groppe and Volker Linnemann", title = "Xobe Sensor Networks: Integrating XML in sensor network programming", year = "2008", month = jun, booktitle = "Proceedings of the 5th International Conference on Networked Sensing Systems (INSS 2008)", address = "Kanazawa, Japan" }

Martin Lipphardt, Jana Neumann, Nils Hoeller, Christoph Reinke, Sven Groppe, Volker Linnemann, and Christian Werner,
XML und SOA als Wegbereiter für Sensornetze in der Praxis, Praxis der Informationsverarbeitung und Kommunikation , vol. 31, no. 3, pp. 146--152, 2008.

DOI:	10.1515/piko.2008.0027
File:	piko.2008.0027

Sven Groppe, and Jinghua Groppe,
Output schemas of XSLT stylesheets and their applications, Inf. Sci. , vol. 178, no. 21, pp. 3989--4018, 2008.

DOI:	10.1016/j.ins.2008.06.024
File:	j.ins.2008.06.024

Sven Groppe, Jinghua Groppe, and Stefan Böttcher,
Simplifying XPath queries for optimization with regard to the elimination of intersect and except operators, Data Knowl. Eng. , vol. 65, no. 2, pp. 198--222, 2008.

DOI:	10.1016/j.datak.2007.09.002
File:	j.datak.2007.09.002

Matthias Droop, Markus Flarer, Jinghua Groppe, Sven Groppe, Volker Linnemann, Jakob Pinggera, Florian Santner, Michael Schier, Felix Schöpf, Hannes Staffler, and Stefan Zugal,
Embedding Xpath Queries into SPARQL Queries, in Proceedings of the Tenth International Conference on Enterprise Information Systems (ICEIS), Barcelona, Spain , 2008. pp. 5--14.

Sven Groppe, Jinghua Groppe, Volker Linnemann, Dirk Kukulenz, Nils Hoeller, and Christoph Reinke,
Embedding SPARQL into XQuery/XSLT, in Proceedings of the 2008 ACM Symposium on Applied Computing (SAC), Fortaleza, Ceara, Brazil , 2008. pp. 2271--2278.

DOI:	10.1145/1363686.1364228
File:	1363686.1364228

Nils Hoeller, Christoph Reinke, Jana Neumann, Sven Groppe, Daniel Boeckmann, and Volker Linnemann,
Efficient XML usage within wireless sensor networks, in Proceedings of the 4th Annual International Conference on Wireless Internet (WICON), Maui, Hawaii, USA , 2008. pp. 74.

DOI:	10.4108/ICST.WICON2008.4787
File:	ICST.WICON2008.4787

Martin Lipphardt, Jana Neumann, Sven Groppe, and Christian Werner,
DySSCo - A Protocol for Dynamic Self-Organizing Service Coverage, in Third International Workshop on Self-Organizing Systems (IWSOS), Vienna, Austria , Wien, Österreich: Springer-Verlag, 2008. pp. 109--120.

DOI:	10.1007/978-3-540-92157-8\_10
File:	978-3-540-92157-8\_10
Bibtex:	@inproceeding{LiNeGrWe08, author = {Martin Lipphardt, Jana Neumann, Sven Groppe und Christian Werner}, title = {DySSCo - A protocol for Dynamic Self-organizing Service Coverage}, month = {December 10-12}, booktitle= {Proceedings of the 3rd International Workshop on Self-Organizing Systems}, year = {2008}, address = {Wien, Österreich}, pages = {}, volume = {}, publisher = {Springer-Verlag}, isbn = {}, doi = {}, bibsource = {IFIS, Universit{\"a}t zu L{\"u}beck}, copyright = {Springer-Verlag} }

Matthias Droop, Markus Flarer, Jinghua Groppe, Sven Groppe, Volker Linnemann, Jakob Pinggera, Florian Santner, Michael Schier, Felix Schöpf, Hannes Staffler, and Stefan Zugal,
Bringing the XML and Semantic Web Worlds Closer: Transforming XML into RDF and Embedding XPath into SPARQL, in 10th International Conference on Enterprise Information Systems (ICEIS), Barcelona, Spain, Revised Selected Papers , 2008. pp. 31--45.

DOI:	10.1007/978-3-642-00670-8\_3
File:	978-3-642-00670-8\_3

Sven Groppe, Jinghua Groppe, Dirk Kukulenz, and Volker Linnemann,
A SPARQL Engine for Streaming RDF Data, in Third International IEEE Conference on Signal-Image Technologies and Internet-Based System (SITIS), Shanghai, China , 2007. pp. 167--174.

DOI:	10.1109/SITIS.2007.22
File:	SITIS.2007.22