The main focus of this research repport is ot portrait and highlights
the important features and measurements of the ontology learning. First,
define different methodologies and approaches which are utilized for
automatic extraction of the information from the population of text
(structured text, existing ontologies). Second, describe the different
espects researchers. Define the aim of these evolutionary methodologies
for ontology learning. Third, the evalution methods of ontology learning
and applications of ontology learning.