All. via MetaLink, I found DocId Note:132904.1 which is a compatibility matrix for exp/imp between versions. I cannot directly import a 10.2 dmp file into a 9.2 database, no matter how badly I need to. So, I will have to find another path to follow. I hope to find enough space to setup a temporary 10.2 database, import the data, then export the data using the 9.2 export facility, and finally import that data into the 9.2 database. That seems to be my simplest option since I have no direct access to the original data source.