This directory holds the C and Prolog sources comprising the Persistent Term
Storage Facility, also called the External Database.

Reference: Nilsson,H: "The External Storage Facility in SICStus Prolog", 
	   SICS Research Report R91:13.

The files are:

    Makefile:	The installation script.
    README:	This text.
    config.c:	Used during compilation if the database. Checks the 
		      parameter consistency, produces db_config.c with some
		      data about the compilation (date, parameters etc).
    alloc.c:	Allocation of common areas in the virtual address space.
    alloc.h:	Allocation of common areas in the virtual address space.
    cache.c:	The software cache.
    cache.h:	The software cache.
    config.c:	Configuration file generator.
    db_conf.h:	Declarations for the generated configuration file.
    decl.h:	Common declarations.
    file.c:	File and directory functions for creation and check of
		the database directory and files.
    file.h:	Definitions of file and directory functions for creation
		and check.
    hash.c:	Portable term hashing.
    insert.c:	Functions for insert, retrieve and delete.
    insert.h:	Functions for insert, retrieve and delete.
    magic.h:	Magic number checking.
    message.c:	Second half of an error message.
    param.h:	Cache parameters and some other high level parameters.
    print.c:	Print or check the database.
    stats.c:	Prolog predicate for measuring on the database.
    stats.h:	Prolog predicate for measuring on the database.
    top.c:	All Prolog predicates except statistics and printing.
