152 6 Information Retrieval
Figure 6.3 Top part of the result screen for the SKIP retrieval system showing the
knowledge representation of the query and the document that matches the query the
best.The first two matching documents match the best. They contain all of the
concepts in the query, and all but two of them are related as in the query.
The only relationship that was not found in these documents was between
“plasma membrane” and “lymphocytes.” The knowledge representation to
the left of the document link shows the part of the query that was found in
the document.
Scrolling down the result screen gives figure 6.4 which shows a number
of other documents that contain fewer concepts and relationships than the
documents that match the best. Continuing to scroll the results screen will
show many more matching documents, but these match less and less of the
original query.
This approach to retrieval has some advantages that were already dis-
cussed above. Another advantage specific to SKIP is that the retrieved doc-
uments are arranged in groups and labeled by how they match using an
intuitive and visually appealing graphical structure.