Information Technology Reference
In-Depth Information
Fig. 4. Example graph based on the docQuery application
and medicaments that can be taken at the location. This query returns an initial
list of recommendable medicament candidates. Further on, the information given
by the user (Activities = “diving” and “road trip”) is used to request informa-
tion from the activity agent defining constraints for medicament recommenda-
tions (e.g. Activity = “Diving”
Associated factors = “high sun exposure”)
which are then again used to query the medicaments agent. In this example a
query for Counter Indication = “high sun exposure” would return, among others,
the Malaria prophylaxis Doxycyclin Monohydrat, which would then be removed
from the initial list of recommended medicaments. Also, if specified, the influ-
ences of chronic illnesses on recommended medicaments and planned activities
are queried. The combined information from all Topic Agents is compiled into an
information leaflet using ready prepared templates. ( “When traveling to Indone-
sia, please consider the following general information: ... Certified hospitals can
be found in the following places: ... A journey to Indonesia carries the following
risks: ... We recommend the following medicaments: ... These medicaments are
not recommended because of the following reasons ...” ) The Knowledge Map
itself is stored as an XML document. We use RDF as the wrapper format and
describe the individual nodes with a name space of our own. Based on the knowl-
edge map we then use a modified Dijkstra algorithm [20] to determine an optimal
route over the graph. The algorithm is modified in such a way that it optimizes
its route by trying to maximize the arithmetic mean of all queried nodes. In
thecaseofatiebetweentwopossibleroutestheonewiththelesservariance
is chosen.
5.3 Maintenance of Knowledge Sources
docQuery deals with different kinds of data and each kind has to be maintained
differently. We will define maintaining processes for each source focusing on
exact, up-to-date and reliable data. Furthermore each source will have its own
 
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