S. Abiteboul, Querying Semistructured Data, Proceeding of the 6th International Conference on Database Theory, 1997.

R. Ali and G. Moerkotte, Query Rewriting with Coko-Kola, 2004.

S. Amer-yahia, S. Cho, L. V. Lakshmanan, and D. Srivastava, Minimization of Tree Pattern Queries, SIGMOD Conference, 2001.

D. Calmès, H. Prade, and F. Sedes, Requêtes flexibles et données semi-structurées -quelqueséléments quelques´quelqueséléments de discussion et d'implémentation, LFA, pp.23-30, 2003.

M. J. Carey, D. J. Dewitt, G. Graefe, D. M. Haight, J. E. Richardson et al., The EXODUS Extensible DBMS Project : An Overview, Readings on Object-Oriented Database Sys, 1990.

Z. Chen, H. Jagadish, L. V. Laksmanan, P. , and S. , From Tree Patterns to Generalized Tree Patterns, Very Large Data Bases, pp.237-248, 2003.
DOI : 10.1016/B978-012722442-8/50029-X

M. Cherniack and S. B. Zdonik, Changing the Rules : Transformations for Rule-Based Optimizers, SIGMOD Conference, pp.61-72, 1998.

E. Damiani and L. Tanca, Blind Queries to XML Data, Database and Expert System Applications, pp.266-279, 2000.
DOI : 10.1007/3-540-44469-6_32

E. Damiani, L. Tanca, and F. Arcelli, Fuzzy xml queries via context-based choice of aggregation, p.36, 2000.

T. Dang-ngoc, G. Gardarin, T. , and N. , Tree graph view : On efficient evaluation of xquery in an xml mediator, Actes de publication de la 20ème conférence Bases de Données Avancées, pp.429-448, 2004.
URL : https://hal.archives-ouvertes.fr/hal-00733494

F. Dragan and G. Gardarin, Benchmarking an xml mediator, ICEIS (1), pp.191-196, 2005.
URL : https://hal.archives-ouvertes.fr/hal-00324617

B. Finance and G. Gardarin, A rule-based query optimizer with multiple search strategies, Data & Knowledge Engineering, vol.13, issue.1, pp.1-29, 1994.
DOI : 10.1016/0169-023X(94)90045-0

G. Graefe and W. J. Mckenna, The Volcano optimizer generator: extensibility and efficient search, Proceedings of IEEE 9th International Conference on Data Engineering, pp.209-218, 1993.
DOI : 10.1109/ICDE.1993.344061

H. Jagadish, L. V. Lakshmanan, D. Srivastava, and K. Thompson, TAX: A Tree Algebra for XML, DBPL, pp.149-164, 2001.
DOI : 10.1007/3-540-46093-4_9

N. Kabra and D. J. Dewitt, OPT++ : an object-oriented implementation for extensible database query optimization, VLDB Journal : Very Large Data Bases, pp.55-78, 1999.
DOI : 10.1007/s007780050074

G. M. Lohman, Grammar-like Functional Rules for representing Query Optimization Alternatives, 1988.
DOI : 10.1145/971701.50204

G. Mitchell, Extensible query processing in an object-oriented database, pp.93-109, 1993.

H. Pirahesh, J. M. Hellerstein, and W. Hasan, Extensible/rule based query rewrite optimization in Starburst, SIGMOD, pp.39-48, 1992.

A. Sihem, C. Sungran, L. V. Laks, and S. Divesh, Tree Pattern Query Minimization, VLDB Journal, vol.11, issue.4, pp.315-331, 2002.

N. Travers, Extensible Optimization in an XML Mediatior, 2006.

N. Travers, T. Dang-ngoc, and T. Liu, TGV : an Efficient Model for XQuery Evaluation within an Interoperable System, Interoperability in Business Information Systems (IBIS), 2006.
URL : https://hal.archives-ouvertes.fr/hal-00733420

N. Travers, T. Dang-ngoc, and T. Liu, An Efficient Evaluation of XQuery with TGV, The 3rd International Conference of WEB Information Systems and Technologies (Web-IST), 2007.
URL : https://hal.archives-ouvertes.fr/hal-00733462

N. Travers, T. Dang-ngoc, and T. Liu, Full Untyped XQuery Canonization, the International workshop on Emerging Trends of Web Technologies and Applications (WebETrends), 2007.
DOI : 10.1007/978-3-540-72909-9_40
URL : https://hal.archives-ouvertes.fr/hal-00141348

N. Travers, T. T. Dang-ngoc, and T. Liu, TGV: A Tree Graph View for Modeling Untyped XQuery, DASFAA, 2007.
DOI : 10.1007/978-3-540-71703-4_92

J. Widom, The Starburst active database rule system, IEEE Transactions on Knowledge and Data Engineering, vol.8, issue.4, pp.583-595, 1996.
DOI : 10.1109/69.536251