a reusable function built-in to the server engine that enables simple as well as complex structural manipulation between source and destination specifications
An executable module that performs a specific calculation or data manipulation, and that is used graphically when constructing BizTalk Server maps to provide the basis for richer transformations than what is provided by XSLT on its own.
Functoids are mapping functions used to apply mathematical or string functions to process mappings in enterprise application integration or business-to-business electronic commerce between left side resource and right side resource or between input and output of a processor.