XENO-02884/1 was a computer file kept in the computer banks of Starfleet starships that detailed everything the United Federation of Planets knows about the neural parasite race first encountered in 2364 and their actions. Among the information in the file was reports submitted by Starfleet personnel such as Christopher Pike, Jean-Luc Picard, Gregory Quinn and Beverly Crusher. A high security clearance was needed to access the file.
In 2376, Admiral Leonard James Akaar gave Kira Nerys his security verification to gain access to the file so she could find a way to fight the parasite who had control of the USS Gryphon. (DS9 - Mission Gamma novel: Lesser Evil)