V. Petkevic The paper deals with coordinated structures in contemporary Czech, especially the structures coordinated by the most frequent conjunctions «a» (English — «and»), «i» (English — «and also») and «nebo» (English «or»). The following problems will be addressed: — identification of coordinated structures in Czech texts; — specification of criteria distinguishing types of conjuncts, especially whether a given conjunction coordinates clauses (clausal coordination) or other syntactic elements such as nominal phrases, adjectival phrases, adverbial phrases etc.

The solution to these problems will be formulated in strict syntactic rules based on morphosyntactically annotated (tagged) corpora of contemporary Czech, especially the corpora SYN2000 and SYN2005. The most important issue deals with clausal and nonclausal coordination: exact context-based rules will be formulated which distinguish between these two kinds of coordination, i.e. the abovementioned conjunctions are tagged as clausal or nonclausal. With a nonclausal conjunction, the type of coordination is also assigned as tag to the conjunction. Such a tagging makes it possible, for instance, to identify a clause in Czech compound sentences; this can further improve both the morphosyntactic tagging and shallow syntactic analysis of contemporary Czech. The author will try to show that the majority of considerations and ideas is valid also for other Slavonic languages, e.g. Russian.