“…The use of more or less complex controlled vocabularies in automatic indexing is a fact. Some examples, although by no means all, are: Strode (1977), Valle Bracero and Fernández García (1983), Biebricher, et al (1988), Silvester, Genuardi and Klingbiel (1994), Gil-Leiva (1997, Plaunt and Nogard (1998), Aronson et al (2000), Steinberger, Hagman and Scheer 2000, Lukhashevich and Dobrov (2001), Montejo (2001), Zha and Hou (2002), Beheshti (2003) or Kolar (2005), Medelyanand Witten (2005, 2008, El-Haj, et al 2013, Willis and Losee (2013), who draw on no fewer than four thesaurusi (AGROVOC, HEP, NALT and MeSH) to evaluate their algorithm, Pickler and Ferneda (2014), Vlachidis and Tudhope (2016) or Dehghani (2015).…”