1                    2                   1
                               Marwa Abdelreheim , Friederike Klan , Taysir Soliman
   1
        Department of Information Systems, Faculty of Computer and Information Sciences, Assiut University, Egypt
                               {marwa.abdelrehem, taysser.soliman}@fci.aun.edu.eg
                        2
                            Institute of Computer Science, Friedrich-Schiller-University Jena, Germany
                                               friederike.klan@uni-jena.de

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                                                                13
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                                                     .


      1.   Scope definition:
           responsible for defining                                             coverage was the most widely used one, as it can filter out

                                                                                the specified keywords. Also, popularity of ontologie
      2.
                                                                                              ,

      3.                                                  n,


           do
      4.   Ontology assessment and verification:
           outputted ontology is assessed and verified.                         extensibility and flexibility to change   .

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                                                                           14
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                                                                             5.
                                                                                  improve the results according to user’s preferences

profiles are manually defined by users or automatically generated
from other users’ data. The main limitation




2.5



their user's needs and requirements). They also don’t allow for




      1.   The tool is used for scientific purposes and includes



      2.
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                                                                    15
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    16
3.2


                   two
                              6
      1.
                                                                                 , pp. 9–34.
                              [2]   Ding, L., Finin, T., Joshi, A., Pan, R., Cost, R. S., Peng,
                                                                            2004. Swoogle : A

      2.
                                                 , pp. 10–1145.


                                    WATSON :


           x
                                                         125 140

           x




                                                                     ,                         .




                                                                                               .


               .

                                                              925.




                                                                                               .


                                    Ontologies for the Web (EON’06), at the 15th Int. World
                                    Wide Web Conference (WWW’06)




                         17
                 569
                                     .




                              210.
2005




                 61    76.
        ,
2016.




                 1043 1061.




            18