“…Regarding the request-service matchmaking [service dynamic discovery based on the requestors' preferences with respect to the functional and quality of service (QoS) semantics], some research results are in Benatallah et al (2005), Klusch et al (2006), Jaeger et al (2005), Tsetsos et al (2006), Maximilien and Singh (2004), Kim et al (2005), Bouguettaya et al (2004), Tabatabaei et al (2009), Sorti et al (2009 and Krupaviciute and Fayn (2010), etc. However, the service composition based on semantics is still an open issue.…”