scope:

Although [ISO/IEC 9594-4 / CCITT X.518] describes the DSA procedures relating to referrals and Search Continuation References, this document does not define the DUA's role in action upon these procedures. This ISP specifies the behaviour of DUAs when they use DAP to access multiple DSAs in the course of making a single original enquiry without human intervention in the formulation of protocol. Multiple enquiries result from receiving continuation references embedded in referrals, list results or search results.