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liminary term grouping. Even when only morpho-
syntactic features are available, the results are of a
quality good enough to be used as a starting point
for further processing which may involve manual cor-
rection. The achieved F-measure of about 57% is
not high, but in case of this task, which also proved
difficult for well trained annotators, can be seen as
good enough to be utilized in further domain ontology
development. However, it turned out that morpho-
syntactic information is not sufficient to build reli-
able clusters—additional sources of information will
be searched for to improve quality of the results e.g.
Wordnet which can be used to define semantic simi-
larity between head elements of the different terms.
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