# op:base64Binary-less-than - XPath XQuery Reference

Returns true if the first argument is less than the second.Defines the semantics
         of the "lt" operator when applied to two xs:base64Binary values. Also used in
         the definition of the "ge" operator.The function returns true if any of the following conditions is true:$arg1 is zero-length (contains no octets) and $arg2 is
                  not zero-length.Neither argument is zero-length, and the first octet of $arg1 is less
                  than the first octet of $arg2, treating the value of the octet as an
                  unsigned integer in the range 0 to 255.Neither argument is zero-length, the first octet of $arg1 is equal to
                  the first octet of $arg2, and the xs:base64Binary value
                  formed by taking all octets of arg1 after the first is less than the
                     xs:base64Binary value formed by taking all octets of
                     arg2 after the first.Otherwise, the function returns false.