1 string(5) 2 string(0.5) 3 string(-0.5) 4 string(true()) 5 string(false()) 6 concat("titi","toto") 7 concat("titi","toto","tata") 8 concat("titi",'toto') 9 concat("titi",'toto',"tata","last") 10 starts-with("tititoto","titi") 11 starts-with("tititoto","to") 12 contains("tititototata","titi") 13 contains("tititototata","toto") 14 contains("tititototata","tata") 15 contains("tititototata","tita") 16 substring("12345",2,3) 17 substring("12345",2) 18 substring("12345",-4) 19 substring("12345",3.4) 20 substring("12345",3.6) 21 substring("12345",1.5,2.6) 22 substring("12345",2.2,2.2) 23 substring("12345",0,3) 24 substring("12345",-8,10) 25 substring("12345",4,-10) 26 substring("12345",0 div 0, 3) 27 substring("12345",1, 0 div 0) 28 substring("12345",1 div 0, 3) 29 substring("12345",3,-1 div 0) 30 substring("12345",-42, 1 div 0) 31 substring("12345",-1 div 0, 1 div 0) 32 substring("12345",-1 div 0,5) 33 string-length("") 34 string-length("titi") 35