5.2 Search quality
The quality of the search technique was evaluated in
terms of accuracy and completeness using standard
precision and recall metrics, where the correct results
are the answers returned by schema-aware languages
such as XQuery. The precision measures the search
accuracy, indicating the fraction of results in the ap-
proximate answer that are correct, while recall meas-
ures completeness, indicating the fraction of all the
correct results actually captured in the approximate
answer.