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Figure 9. Portal interaction
Additionally, the initial CIM generates five
instances of the “Physician” concept. In this situ-
ation, the same ophthalmologist is in charge of
all medical documents: Assessment, Operative,
and Post-Op reports. Therefore, the user merges
the three instances that are denoted with an
“Ophthalmologist” link together. The other two
“Physician” instances, the referring physician
and the anaesthesiologist, represent different in-
dividuals in this situation. The right side of Figure
8 illustrates the final CIM after merging all the
instances that refer to the same person. Note that
the “Assessment Report” WPC and the “Post-Op
Report” are linked to different instances of the
“Corrected Vision Exam” element. This reflects
the real life scenario because one of the exams is
performed during the assessment phase while the
other exam is performed after the completion of
the surgery.
Figure 9 shows a screen capture of the actual
sample application. For the purpose of customis-
ing the CIM, we have developed “smart browser”
that consists of a normal Web browser pane (right
side) and a context customisation pane (left side).
The context customisation pane is only necessary
for the composition of new portal pages and can be
hidden in case of portal page reuse.
evaluation
Since this work is still in the prototype stage and ac-
cess to the domain experts is limited, an empirical
evaluation of the usability of the new composition
paradigm involving real clinicians cannot yet be
undertaken. However, in the current section we
will theoretically evaluate our approach using the
well-known Cognitive Dimensions Framework
(CDF) (Green, 1989).
The CDF has been developed for evaluating the
usability of programming tools and systems (e.g.,
Kadoda, 2000). We have chosen CDF for this re-
search mainly because, unlike many other usability
evaluation tools, it is designed for nonspecialists
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