ASTERIX applications are organised into ADAM shared image monoliths. Each monolith contains a group of related applications, for instance spectral analysis programs. Fortran source files are stored separately for each monolith in subdirectories below [.SOURCE]. They are held in text libraries and there is a corresponding object library for each monolith. The only other source files are held in a library called ASTLIB which is held in [.LIB]. This is a general library which applications from all monoliths link into. All the files needed to run ASTERIX monoliths are contained in [.EXE]. These include the executable code for the monoliths as well as compiled interface files and ICL command definition files. Individual Atask versions of the applications reside in a subdirectory of this called [.TASKS] and ICL procedures are held in the [.PROCS] subdirectory.
The whole directory structure is set up as a substructure of the pseudo-device AST_ROOT: which points to an [ASTERIX.] directory level, whose location is system dependent.