Variability type | Papers |
---|---|
Optional | (Bertolino and Gnesi 2003; Bragança and Machado 2005; Eriksson et al. 2005; Gallina and Guelfi 2007; Gomaa 2004; Jirapanthong 2009; Nguyen 2009) |
Optional alternative at least 1 | (Eriksson et al. 2005) |
Optional alternative exactly 1 | |
Mandatory alternative at least 1 | (Eriksson et al. 2005) |
Mandatory alternative exactly 1 | (Bertolino and Gnesi 2003; Bragança and Machado 2005; Eriksson et al. 2005; Gallina and Guelfi 2007; Gomaa 2004; Jirapanthong 2009; Nguyen 2009) |