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@Article{Callmeier:2000,
      AUTHOR = {Callmeier, Ulrich},
      TITLE = {PET. A Platform for Experimentation with Efficient HPSG Processing Techniques},
      YEAR = {2000},
      JOURNAL = {Journal of Natural Language Engineering},
      VOLUME = {6},
      NUMBER = {1},
      PAGES = {99-108},
      URL = {https://www.coli.uni-saarland.de/~uc/pubs/nle00.ps},
      ANNOTE = {COLIURL : Callmeier:2000:PPE.pdf Callmeier:2000:PPE.ps}
}

@MastersThesis{Callmeier:2001,
      AUTHOR = {Callmeier, Ulrich},
      TITLE = {Efficient Parsing with Large-Scale Unification Grammars},
      YEAR = {2001},
      ADDRESS = {Saarbrücken, Germany},
      SCHOOL = {Universität des Saarlandes, Informatik},
      TYPE = {Diplomarbeit}
}

@InCollection{Callmeier:2002,
      AUTHOR = {Callmeier, Ulrich},
      TITLE = {Preprocessing and Encoding Techniques in PET},
      YEAR = {2002},
      BOOKTITLE = {Collaborative Language Engineering. A Case Study in Efficient Grammar-based Processing},
      EDITOR = {Oepen, Stephan and Flickinger, Dan and Tsujii, Jun-ichi and Uszkoreit, Hans},
      ADDRESS = {Stanford},
      PUBLISHER = {CSLI Publications}
}

@InProceedings{Oepen_et_al:2002,
      AUTHOR = {Oepen, Stephan and Bender, Emily and Callmeier, Ulrich and Flickinger, Dan and Siegel, Melanie},
      TITLE = {Parallel Distributed Grammar Engineering for Practical Applications},
      YEAR = {2002},
      BOOKTITLE = {Proceedings of the 19th International Conference on Computational Linguistics},
      ADDRESS = {Taipei, Taiwan},
      URL = {http://www-csli.stanford.edu/~bender/papers/gee13.pdf},
      ABSTRACT = {Based on a detailed case study of parallel grammar development distributed across two sites, we review some of the requirements for regression testing in grammar engineering, summarize our approach to systematic competence and performance profiling, and discuss our experience with grammar development for a commercial application. If possible, the workshop presentation will be organized around a software demonstration.},
      ANNOTE = {COLIURL : Oepen:2002:PDG.pdf}
}

@InProceedings{Oepen_Callmeier:2000,
      AUTHOR = {Oepen, Stefan and Callmeier, Ulrich},
      TITLE = {Measure for Measure: Parser Cross-Fertilization. Towards Increased Component Comparability and Exchange},
      YEAR = {2000},
      BOOKTITLE = {Proceedings of the 6th International Workshop on Parsing Technology (IWPT '00), February 23-25},
      PAGES = {183-194},
      ADDRESS = {Trento, Italy},
      URL = {https://www.coli.uni-saarland.de/itsdb/publications/fertilization.ps.gz https://www.coli.uni-saarland.de/~uc/pubs/iwpt00.pdf},
      ABSTRACT = {Over the past few years significant progress was accomplished in efficient processing with wide-coverage HPSG grammars. HPSG-based parsing systems are now available that can process medium-complexity sentences (of ten to twenty words, say) in average parse times equivalent to real (i.e. human reading) time. A large number of engineering improvements in current HPSG systems were achieved through collaboration of multiple research centers and mutual exchange of experience, encoding techniques, algorithms, and even pieces of software. This article presents an approach to grammar and system engineering, termed competence & performance profiling, that makes systematic experimentation and the precise empirical study of system properties a focal point in development. Adapting the profiling metaphor familiar from software engineering to constraint-based grammars and parsers, enables developers to maintain an accurate record of system evolution, identify grammar and system deficiencies quickly, and compare to earlier versions or between different systems. We discuss a number of exemplary problems that motivate the experimental approach, and apply the empirical methodology in a fairly detailed discussion of what was achieved during a development period of three years. Given the collaborative nature in setup, the empirical results we present involve research and achievements of a large group of people.},
      ANNOTE = {COLIURL : Oepen:2000:MMP.pdf Oepen:2000:MMP.ps}
}

@InProceedings{Callmeier_et_al:2004,
      AUTHOR = {Callmeier, Ulrich and Eisele, Andreas and Schäfer, Ulrich and Siegel, Melanie},
      TITLE = {The DeepThought Core Architecture Framework},
      YEAR = {2004},
      BOOKTITLE = {Proceedings of LREC 04},
      ADDRESS = {Lisbon, Portugal},
      ANNOTE = {Callmeier:2004:DCA}
}

@InProceedings{Callmeier_et_al:2004_1,
      AUTHOR = {Callmeier, Ulrich and Eisele, Andreas and Schäfer, Ulrich and Siegel, Melanie},
      TITLE = {The Deep Thought Core Achitecture Framework},
      YEAR = {2004},
      MONTH = {June},
      BOOKTITLE = {Proceedings of LREC},
      ADDRESS = {Lisbon}
}

@InProceedings{AdOeCaCrFlKi2008,
      AUTHOR = {Adolphs, Peter and Oepen, Stephan and Callmeier, Ulrich and Crysmann, Berthold and Flickinger, Dan and Kiefer, Bernd},
      TITLE = {Some fine points of hybrid natural language parsing},
      YEAR = {2008},
      BOOKTITLE = {Proceedings of the 6th International Conference on Language Resources and Evaluation : LREC 2008, May 26 - June 1, 2008, Palais des congrès Mansour Eddahbi, Marrakech, Morocco},
      PAGES = {1380-1387},
      ADDRESS = {Paris},
      ORGANIZATION = {ELRA},
      NOTE = {HU}
}