Fully implemented XPath functions

Node-set functions

id()

local-name()

namespace-uri()

name()

position()

String functions

string()

concat()

starts-with()

contains()

substring-before()

substring-after()

string-length()

normalize-space()

translate()

Boolean functions

boolean()

not()

true()

false()

lang()

Number functions

number()

floor()

ceiling()