“…One of the aspects that existing methods can be classified based on it is the type of the source of transmission. They are roughly classified into one of the five categories: approaches based on an analysis of relational sche Q1 ma (Stojanovic et al, 2002;Li et al, 2005;Sane and Shirke, 2009;Dong et al, 2013;Thuy et al, 2014), approaches based on an analysis of tuples (Astrova, 2004;Sonia and Khan, 2008), approaches based on HTML pages (Astrova and Stantic, 2005;Benslimane et al, 2006), approaches based on entity 2 LHT 34,4 relationship or extended entity relationship models (Xu et al, 2004;Upadhyaya and Kumar, 2005;Trinkunas and Vasilecas, 2007;Zhou et al, 2011;Russo et al, 2012), and approaches based on Structure Query Language (SQL) (Tirmizi et al, 2008;Astrova, 2009;Dadjoo and Kheirkhah, 2015).…”