SUREGEN-II |
SUREGEN-II
in a nutshell |
Conceptual
aggregation, which in the case of medical documents can be understood as
the substitution of several expressions denoting certain entities by a
single term or phrase encompassing these, cannot be done without knowledge
of the discourse domain. Consider, for instance, the decision whether “sclerosis
of the RCA, the LCA and the rami marginales” should be described as “global
coronary sclerosis”. Although this is the most common case, conceptual
aggregation does not occur only along the “part-of” relation. A “mitral
regurgitation” and a “stenosis of the mitral valve” should adequately be
described as “combined mitral valve disease”. Supporting this type of aggregation
is a very difficult task and it is not yet realized satisfactorily in Suregen-2.
Conjunction
reduction is much more a syntactical task and can be construed as merging
phrases or clauses which
It
is important to understand that not every construct with “and” can be aggregated
this way: Sometimes the “and” carries the (temporal) meaning of “and (then
we did so and so)” or is used to denote causality “and (therefore
it happened that)”. These connotations are much weaker or even lost
in the aggregated forms. It may even be the case that the new aggregation
carries another meaning, not present in the isolated expressions (that
“Mick is married and Carly is married” is not equivalent to “Mick and Carly
are married” is the standard example of such a case. It is therefore necessary
that the user specifies (in the ToDescribe-form)
whether Aggregate
is to be called or not.