“…Another group of papers provides separation in two ways. Firstly, authors use manual mark-up and ready skill bases before the stage of skill sets detection ( Cao et al, 2021 ; Hoang et al, 2018 ; Skhvediani et al, 2021 ; Papoutsoglou, Mittas & Angelis, 2017 ; Hiranrat & Harncharnchai, 2018 ; Cegielski & Jones-Farmer, 2016 ). Secondly, researchers obtain “soft” skills mapping using domain experts correction after classifying or clustering job advertisements ( Colombo, Mercorio & Mezzanzanica, 2019 ; Litecky, Igou & Aken, 2012 ; Gardiner et al, 2018 ; Brooks, Greer & Morris, 2018 ; Hussain, Clear & MacDonell, 2017 ; Sodhi & Son, 2010 ; Gurcan & Cagiltay, 2019 ; Radovilsky et al, 2018 ; Giabelli et al, 2020 ; Wu, Shi & Yang, 2017 ).…”