The ISO-10161 protocol is an international communications standard that permits the exchange of ILL messages among ILL systems even if they use different hardware and software. It also controls ILL transactions for both lending and borrowing activities.
Web site includes details about the protocol as well as instructions for ordering the documentation.
The system sending the request does not have to be the system of the borrowing institution. The first request sent during a connection must contain a valid OCLC ILL authorization and password. However, the requests sent during the connection can be for different OCLC institutions. For example, OCLC member COL may send requests for borrowing libraries COL , CRE , LIB , and OND . The authorization and password sent in the first request may belong to any of them.