“…Bi-directional traceability (Salih et al, 2021), linking to UML diagrams (Arunthavanathan et al, 2016;Salih and Sahraoui, 2018;Kchaou et al, 2019;Salih et al, 2021;Panichella et al, 2015;Kchaou. et al, 2017;Effa Bella et al, 2018), fuzzy logic (Thommazo et al, 2013), reducing false positives (Effa Bella et al, 2019;Capobianco et al, 2013b), are some examples of how NLP was used during the REQ phase.…”