Using the Invoke Medium Map (IMM) structured field

Retrieval programs must be able to detect which medium map is active, to ensure that pages are reprinted (or viewed) using the correct medium map.

To ensure that the correct medium map is used, use the Active Medium Map triplet and the Medium Map Page Number triplet (from the appropriate Index Element [IEL] structured field in the index object file), which designate the name of the last explicitly invoked IMM structured field and the number of pages produced since the IMM structured field was invoked. The retrieval system can use this information to dynamically create IMM structured field at the appropriate locations when it retrieves a group of pages from the archived document file.