20
ogy
O, instantiate the classes and relations by extracting information from search
engine snippets.
2
2.1.4 Evaluating a Populated Ontology
Having populated an ontology, we want to obtain insight in the quality of the in-
formation extracted in terms of soundness and completeness. That is, the extracted
information on the one hand needs to be correct and on the other hand as complete
as possible.
Hereto, we use the standard measures precision and recall. To measure preci-
sion and recall, we assume a ground truth ontology
O
ref
to be given.
For the set
O
Dostları ilə paylaş: