Computational models of morphology are best seen not as morphologi cal models but rather ets natural language processing frameworks which can express descriptions in the style of one morphological model or the other, and even go further, but without necessarily being bound by "purely" theoretical considerations. Criteria for their adequacy can be derived by treating them (together with the linguistic descriptions that are expressed in their formalisms) as NLP systems, for which a number of

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... can be stated, among which are sufficient coverage, efficiency, augmentability and flexibility. The two-level model (T W O L ) of Kimmo Koskenniemi is the main object o f attention in this article and examples of its applicability to Bulgarian morphology are presented. 8 6