The paper presents the analysis of Czech verbal prefixes, which is the first step of a project that has the ultimate goal an automatic morphemic analysis of Czech. We studied prefixes that may occur in Czech verbs, especially their possible and impossible combinations.
We describe a procedure of prefix recognition and derive several general rules for selection of a correct result. The analysis of "double" prefixes enables to make conclusions about universality of the first prefix.
We also added linguistic comments to several types of prefixes.