Sven Groppe, Jinghua Groppe, and Volker Linnemann,
How to Determine Output Schemas of XQuery Queries, in Workshop Proceedings of the 24th British National Conference on Databases (BNCOD), University of Glasgow, UK , 2007. pp. 130--139.

DOI:	10.1109/BNCOD.2007.11
File:	BNCOD.2007.11

Beda Christoph Hammerschmidt, Christian Werner, Ylva Brandt, Volker Linnemann, Sven Groppe, and Stefan Fischer,
Incremental Validation of String-Based XML Data in Databases, File Systems, and Streams, in 11th East European Conference on Advances in Databases and Information Systems (ADBIS), Varna, Bulgaria , 2007. pp. 314--329.

DOI:	10.1007/978-3-540-75185-4\_23
File:	978-3-540-75185-4\_23

Dirk Kukulenz, Nils Hoeller, Sven Groppe, and Volker Linnemann,
Optimization of Bounded Continuous Search Queries Based on Ranking Distributions, in 8th International Conference on Web Information Systems Engineering (WISE), Nancy, France , 2007. pp. 26--37.

DOI:	10.1007/978-3-540-76993-4\_3
File:	978-3-540-76993-4\_3

Matthias Droop, Markus Flarer, Jinghua Groppe, Sven Groppe, Volker Linnemann, Jakob Pinggera, Florian Santner, Michael Schier, Felix Schöpf, Hannes Staffler, and Stefan Zugal,
Translating XPath Queries into SPARQL Queries, in On the Move to Meaningful Internet Systems 2007: OTM Workshops, OTM Confederated International Workshops and Posters, AWeSOMe, CAMS, OTM Academy Doctoral Consortium, MONET, OnToContent, ORM, PerSys, PPN, RDDS, SSWS, and SWWS, Vilamoura, Portugal , 2007. pp. 9--10.

DOI:	10.1007/978-3-540-76888-3\_5
File:	978-3-540-76888-3\_5

Sven Groppe, Jinghua Groppe, and Volker Linnemann,
Using an index of precomputed joins in order to speed up SPARQL processing, in Proceedings of the Ninth International Conference on Enterprise Information Systems (ICEIS), Funchal, Madeira, Portugal , 2007. pp. 13--20.

Sven Groppe, Stefan Böttcher, Georg Birkenheuer, and André Höing,
Reformulating XPath queries and XSLT queries on XSLT views, Data Knowl. Eng. , vol. 57, no. 1, pp. 64--110, 2006.

DOI:	10.1016/j.datak.2005.04.002
File:	j.datak.2005.04.002

Sven Groppe, Stefan Böttcher, and Jinghua Groppe,
XPath Query Simplification with regard to the Elimination of Intersect and Except Operators, in Proceedings of the 22nd International Conference on Data Engineering Workshops (ICDEW), Atlanta, GA, USA , 2006. pp. 86.

DOI:	10.1109/ICDEW.2006.165
File:	ICDEW.2006.165

Sven Groppe, Jinghua Groppe, Stefan Böttcher, and Marc-André Vollstedt,
Shifting Predicates to Inner Sub-expressions for XQuery Optimization, in Second International Conference on Signal-Image Technology and Internet-Based Systems (SITIS), Hammamet, Tunisia, Revised Selected Papers , 2006. pp. 67--79.

DOI:	10.1007/978-3-642-01350-8\_7
File:	978-3-642-01350-8\_7

Jinghua Groppe, and Sven Groppe,
Satisfiability-Test, Rewriting and Refinement of Users' XPath Queries According to XML Schema Definitions, in 10th East European Conference on Advances in Databases and Information Systems (ADBIS), Thessaloniki, Greece , 2006. pp. 22--38.

DOI:	10.1007/11827252\_5
File:	11827252\_5

Ralf Bettentrupp, Sven Groppe, Jinghua Groppe, Stefan Böttcher, and Le Gruenwald,
A Prototype for Translating XSLT into XQuery, in Proceedings of the Eighth International Conference on Enterprise Information Systems: Databases and Information Systems Integration (ICEIS), Paphos, Cyprus , 2006. pp. 22--29.

Jinghua Groppe, and Sven Groppe,
Filtering Unsatisfiable XPATH Queries, in Proceedings of the Eighth International Conference on Enterprise Information Systems: Databases and Information Systems Integration (ICEIS), Paphos, Cyprus , Amsterdam, The Netherlands, The Netherlands: Elsevier Science Publishers B. V., 2006. pp. 157--162.

DOI:	10.1016/j.datak.2007.06.018
File:	j.datak.2007.06.018
Bibtex:	@article{GrGr, author = {Jinghua Groppe and Sven Groppe}, title = {Filtering unsatisfiable XPath queries}, journal = {Data & Knowledge Engineering}, volume = {64}, number = {1}, year = {2008}, pages = {134--169}, doi = {http://dx.doi.org/10.1016/j.datak.2007.06.018}, publisher = {Elsevier Science Publishers B. V.}, address = {Amsterdam, The Netherlands, The Netherlands}, issn = {0169-023X}, bibsource = {IFIS, Universit{\"a}t zu L{\"u}beck} }

Sven Groppe, and Jinghua Groppe,
Determining the Output Schema of an XSLT Stylesheet, in Communications of the Tenth East-European Conference on Advances in Databases and Information Systems (ADBIS), Thessaloniki, Greece , 2006.

File:

paper13.pdf

Jinghua Groppe, and Sven Groppe,
Automated Profile Mapping, in IASTED International Conference on Databases and Applications, Innsbruck, Austria , 2006. pp. 13--18.

Jinghua Groppe, and Sven Groppe,
A Prototype of a Schema-Based XPath Satisfiability Tester, in 17th International Conference on Database and Expert Systems Applications (DEXA), Kraków, Poland , 2006. pp. 93--103.

DOI:	10.1007/11827405\_10
File:	11827405\_10

Matthias Becker, Sven Groppe, and Jinghua Groppe,
EasyFormFill: A Mapping-Based Application to Automatically Fill HTML-Forms, in Proceedings of Semantics, Vienna, Austria , 2006.

Niklas Klein, Sven Groppe, Stefan Böttcher, and Le Gruenwald,
A Prototype for Translating XQuery Expressions into XSLT Stylesheets, in 9th East European Conference on Advances in Databases and Information Systems (ADBIS), Tallinn, Estonia , 2005. pp. 238--253.

DOI:	10.1007/11547686\_18
File:	11547686\_18

Sven Groppe, and Stefan Böttcher,
Schema-based Query Optimization for XQuery Queries, in Communications of the Ninth East-European Conference on Advances in Databases and Information Systems (ADBIS), Tallinn, Estonia , 2005.

File:

paper5.pdf

Sven Groppe,
XML Query reformulation for XPath, XSLT and XQuery., .... Sierke Verlag, 2005.

ISBN:	3-933893-24-0
File:	978702352

Sven Groppe, Stefan Böttcher, Reiko Heckel, and Georg Birkenheuer,
Using {XSLT} Stylesheets to Transform XPath Queries, in 8th East European Conference on Advances in Databases and Information Systems (ADBIS), Budapest, Hungary , 2004.

File:

5-Groppe.pdf

Stefan Böttcher, Sven Groppe, and Tim Schattkowsky,
Automated Data and Service Mapping for Integrated Electronic Markets, in Proceedings of the 8th World Multi-Conference on Systemics, Cybernetics and Informatics, Orlando, Florida , 2004.

Sven Groppe, and Stefan Böttcher,
Query Reformulation for the XML standards XPath, XQuery and XSLT, in Berliner XML Tage, Berlin, Germany , 2004. pp. 53--64.

Sven Groppe, Stefan Böttcher, and Georg Birkenheuer,
Efficient Querying of Transformed XML Documents, in Proceedings of the 6th International Conference on Enterprise Information Systems (ICEIS), Porto, Portugal , 2004. pp. 241--250.

Stefan Böttcher, and Sven Groppe,
Automated Data Mapping for Cross Enterprise Data Integration, in Proceedings of the 5th International Conference on Enterprise Information Systems (ICEIS), Angers, France , 2003. pp. 197--206.

Sven Groppe, and Stefan Böttcher,
Querying transformed XML documents: Determining a sufficient fragment of the original document, in Berliner XML Tage, Berlin, Germany , 2003. pp. 198--212.

Sven Groppe, and Stefan Böttcher,
XPath query transformation based on XSLT stylesheets, in Fifth ACM CIKM International Workshop on Web Information and Data Management (WIDM), New Orleans, Louisiana, USA , 2003. pp. 106--110.

DOI:	10.1145/956699.956723
File:	956699.956723