The StartsWith function (an XSLT function) is used to test whether a string starts with a given string:
<<If(StartsWith(Surname,'van ')>><<Title>> <<Surname>>is probably of Dutch descent.
<<If(StartsWith(Surname,'van ')>><<Setv('LastPart',substring-after(Surname,'van '))>><<End()>>
In previous versions this command was known as starts-with. Backward compatibility ensures that XpressDox will still recognize this command.