Abstract

We discuss acom bination of GSOS-type structural operationalsema tics with explicittermit.(kwfi that we call the tagh-formV (tagh being short fortermkz-.RV and GSOS hybrid).The tagh-formV distinguishes between transition andterm(qk.RV rules, but allows besides active and negativepremfifi. as in GSOS, also for, what is calledtermVkk. RV and passiveargumw ts.We extend the result of Aceto, Bloom and Vaandrager on theautomzV4 generation of sound and com pleteaxiomk(zq.R)4( for GSOS to the setting of tagh-transitionsystem specifications.The construction of the equational theory is based upon the notion of asm oth and distinctive operation, which have been generalizedfrom GSOS to tagh.Theexam)-( provided indicate a significantimk - vemw t over the me hanical axiom.)wfifi).R techniques known so far. 1

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