This volume contains the proceedings of the 11th International Conference on Rewriting Techniques and Applications. The conference was held July 10-12, 2000,attheUniversityofEastAnglia,Norwich,U. K. Itisthemajorforumfor thepresentationofresearchonalltheoreticalandpracticalaspectsofrewriting. InformationaboutpreviousRTAconferencescanbefoundat http://rewriting. loria. fr/rta/ andinformationaboutthegeneralresearchareaofrewritingat http://www. loria. fr/vigneron/RewritingHP/ Theprogramcommitteeselected18papers,includingthreesystemdescr- tions, from a total of 44 submissions. In addition the program included invited talksbyJoseMeseguer,DaleMiller,andAndreiVoronkov;andaninvitedtu- rialbySophieTison. ManypeoplecontributedtoRTA-2000andIwouldliketoexpressmysincere thanks to all of them. I am grateful to the program committee members and the external referees for reviewing the submissions and maintaining the high standard of the RTA conferences; to Richard Kennaway, who was responsible for the local arrangements for the conference; and to Jos' e Meseguer, the RTA publicitychair. ItisaparticularpleasuretothankAshishTiwariforhisextensive assistance in many of my tasks as the program chair.Finally, I wish to thank the School of Information Systems at the University of East Anglia both for ?nancialsupportandforprovidingthefacilities. May2000 LeoBachmair VI Organization ConferenceOrganization ProgramChair LeoBachmair(StonyBrook) ProgramCommittee FranzBaader(Aachen) GillesDowek(Rocquencourt) NeilGhani(Leicester) JuergenGiesl(Albuquerque) Jean-PierreJouannaud(Orsay) ChrisLynch(Potsdam,NewYork) AartMiddeldorp(Tsukuba) MitsuhiroOkada(Tokyo) FemkevanRaamsdonk(Amsterdam) AlbertRubio(Barcelona) YoshihitoToyama(Tatsunokuchi) RakeshVerma(Houston) LocalArrangementsChair RichardKennaway(Norwich) PublicityChair Jos' eMeseguer(MenloPark) RTAOrganizingCommittee HubertComon(Cachan) TobiasNipkow(Munich) NachumDershowitz,chair(Urbana) MichaelRusinowitch(Nancy) Jos' eMeseguer(MenloPark) YoshihitoToyama(Tatsunokuchi) External Referees VII ExternalReferees Y. Akama T. Aoto T. Arts F. Blanqui R. Bloo A. Boudet J. Chrzaszcz E. Contejean D. Dougherty K. Erk M. Fernandez W. Fokkink G. Godoy B. Gramlich T. Ida F. Jacquemard S. Kahrs Y. Kaji D. Kesner K. Kusakari F. Lang C. Luth .. M. Leucker J. Levy R. Matthes R. Mayr B. Monate J. J. MorenoNavarro M. Nagayama P. Narendran J. Niehren R.Nieuwenhuis K. Ogata E. Ohlebusch S. Okui C. -H. L.

This volume contains the proceedings of the 11th International Conference on Rewriting Techniques and Applications. The conference was held July 10-12, 2000,attheUniversityofEastAnglia,Norwich,U. K. Itisthemajorforumfor thepresentationofresearchonalltheoreticalandpracticalaspectsofrewriting. InformationaboutpreviousRTAconferencescanbefoundat http://rewriting. loria. fr/rta/ andinformationaboutthegeneralresearchareaofrewritingat http://www. loria. fr/vigneron/RewritingHP/ Theprogramcommitteeselected18papers,includingthreesystemdescr- tions, from a total of 44 submissions. In addition the program included invited talksbyJoseMeseguer,DaleMiller,andAndreiVoronkov;andaninvitedtu- rialbySophieTison. ManypeoplecontributedtoRTA-2000andIwouldliketoexpressmysincere thanks to all of them. I am grateful to the program committee members and the external referees for reviewing the submissions and maintaining the high standard of the RTA conferences; to Richard Kennaway, who was responsible for the local arrangements for the conference; and to Jos' e Meseguer, the RTA publicitychair. ItisaparticularpleasuretothankAshishTiwariforhisextensive assistance in many of my tasks as the program chair.Finally, I wish to thank the School of Information Systems at the University of East Anglia both for ?nancialsupportandforprovidingthefacilities. May2000 LeoBachmair VI Organization ConferenceOrganization ProgramChair LeoBachmair(StonyBrook) ProgramCommittee FranzBaader(Aachen) GillesDowek(Rocquencourt) NeilGhani(Leicester) JuergenGiesl(Albuquerque) Jean-PierreJouannaud(Orsay) ChrisLynch(Potsdam,NewYork) AartMiddeldorp(Tsukuba) MitsuhiroOkada(Tokyo) FemkevanRaamsdonk(Amsterdam) AlbertRubio(Barcelona) YoshihitoToyama(Tatsunokuchi) RakeshVerma(Houston) LocalArrangementsChair RichardKennaway(Norwich) PublicityChair Jos' eMeseguer(MenloPark) RTAOrganizingCommittee HubertComon(Cachan) TobiasNipkow(Munich) NachumDershowitz,chair(Urbana) MichaelRusinowitch(Nancy) Jos' eMeseguer(MenloPark) YoshihitoToyama(Tatsunokuchi) External Referees VII ExternalReferees Y. Akama T. Aoto T. Arts F. Blanqui R. Bloo A. Boudet J. Chrzaszcz E. Contejean D. Dougherty K. Erk M. Fernandez W. Fokkink G. Godoy B. Gramlich T. Ida F. Jacquemard S. Kahrs Y. Kaji D. Kesner K. Kusakari F. Lang C. Luth .. M. Leucker J. Levy R. Matthes R. Mayr B. Monate J. J. MorenoNavarro M. Nagayama P. Narendran J. Niehren R.Nieuwenhuis K. Ogata E. Ohlebusch S. Okui C. -H. L.

This volume contains the proceedings of the 11th International Conference on Rewriting Techniques and Applications. The conference was held July 10-12, 2000,attheUniversityofEastAnglia,Norwich,U. K. Itisthemajorforumfor thepresentationofresearchonalltheoreticalandpracticalaspectsofrewriting. InformationaboutpreviousRTAconferencescanbefoundat http://rewriting. loria. fr/rta/ andinformationaboutthegeneralresearchareaofrewritingat http://www. loria. fr/vigneron/RewritingHP/ Theprogramcommitteeselected18papers,includingthreesystemdescr- tions, from a total of 44 submissions. In addition the program included invited talksbyJoseMeseguer,DaleMiller,andAndreiVoronkov;andaninvitedtu- rialbySophieTison. ManypeoplecontributedtoRTA-2000andIwouldliketoexpressmysincere thanks to all of them. I am grateful to the program committee members and the external referees for reviewing the submissions and maintaining the high standard of the RTA conferences; to Richard Kennaway, who was responsible for the local arrangements for the conference; and to Jos' e Meseguer, the RTA publicitychair. ItisaparticularpleasuretothankAshishTiwariforhisextensive assistance in many of my tasks as the program chair.Finally, I wish to thank the School of Information Systems at the University of East Anglia both for ?nancialsupportandforprovidingthefacilities. May2000 LeoBachmair VI Organization ConferenceOrganization ProgramChair LeoBachmair(StonyBrook) ProgramCommittee FranzBaader(Aachen) GillesDowek(Rocquencourt) NeilGhani(Leicester) JuergenGiesl(Albuquerque) Jean-PierreJouannaud(Orsay) ChrisLynch(Potsdam,NewYork) AartMiddeldorp(Tsukuba) MitsuhiroOkada(Tokyo) FemkevanRaamsdonk(Amsterdam) AlbertRubio(Barcelona) YoshihitoToyama(Tatsunokuchi) RakeshVerma(Houston) LocalArrangementsChair RichardKennaway(Norwich) PublicityChair Jos' eMeseguer(MenloPark) RTAOrganizingCommittee HubertComon(Cachan) TobiasNipkow(Munich) NachumDershowitz,chair(Urbana) MichaelRusinowitch(Nancy) Jos' eMeseguer(MenloPark) YoshihitoToyama(Tatsunokuchi) External Referees VII ExternalReferees Y. Akama T. Aoto T. Arts F. Blanqui R. Bloo A. Boudet J. Chrzaszcz E. Contejean D. Dougherty K. Erk M. Fernandez W. Fokkink G. Godoy B. Gramlich T. Ida F. Jacquemard S. Kahrs Y. Kaji D. Kesner K. Kusakari F. Lang C. Luth .. M. Leucker J. Levy R. Matthes R. Mayr B. Monate J. J. MorenoNavarro M. Nagayama P. Narendran J. Niehren R.Nieuwenhuis K. Ogata E. Ohlebusch S. Okui C. -H. L.