In this paper, we want to describe a tagger/lemmatiser for Dutch medical vocabulary, which consists of a full-form dictionary and a morphological recogniser for unknown vocabulary coupled to an expert system-like disambiguation module. Attention is also paid to the main datastructures: a lexical database and feature bundles implemented as directed acyclic graphs. some evaluation results are presented as well. The tagger/lemmatiser currently functions as a lexical front-end for a syntactic parser. For pure tagging/lemmatising purposes, a reduced tagset (not suited for sentence analysis) can be used as well.