Guide to BizTalk Server

XPath 1.0 have many string functions:
concat(string string1, string string2, …)— This function returns all strings you pass to it concatenated (that is, joined) together.
contains(string string1, string string2)— This function returns true if the first string contains the second one.
normalize-space(string string1)— This function returns string1 after leading and trailing whitespace is stripped and multiple consecutive whitespace [...]