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<HEAD>
<TITLE> History of updates </TITLE>
</HEAD>
<BODY>

<center>
<H2> History of Updates </H2>
</center>
<LI> October, 2000, Version 5.0-a
	<UL> 
	<LI> Interface with Java 2 (JDK 1.2 and 1.3)
        <LI> Line editor works for NT/Windows 2000.
        <LI> Bug fixes in assert, catch/throw, setof and ISO-IO. Missing predicate u_ge_c added.
        <LI> Interface with C improved. The following C functions are added:
	<UL> 
	   <LI> bprolog_call_string(char *s)
	   <LI> bprolog_call_term(TERM t)
           <LI> bprolog_mount_query_string(char *s)
           <LI> bprolog_mount_query_term(TERM t)
           <LI> bprolog_next_solution()
           <LI> bprolog_string_2_term(char *s, TERM t)
           <LI> (char *)bprolog_term_2_string(TERM t)
        </UL>
       </UL>

<LI> August, 2000, Version 5.0
	<UL>
	<LI> Garbage collection 
        <LI> CG: A constraint-based graphics library
        <LI> Support of large-arity (up to 32768) structures
        <LI> Catch and throw 
        <LI> Global variables and space-efficient assert 
        <LI> Improvement of the efficiency of the finite-domain constraint solver 
        <LI> Hash tables, arrays, and set constraint solver
        </UL>

<LI> November, 1999, Version 4.0
	<UL>
	<LI> Slight speed-up
	<LI> Hybrid propagation algorithm for FD constraints
	<LI> Interface with C and Java improved
	<LI> New built-ins: 
          susp_var/1, chdir/1, set_prolog_flag/2, current_prolog_flag/2, once/1
	<LI> read_term/2 is ISO-compliant
   	<LI> Warning messages are more friendly
	<LI> A bug in tabling fixed
	</UL>
	
<LI> April, 1999, Version 3.2
	<UL>
        <LI> Tabling
        <LI> Dynamic and consulted code become 20-30% faster 
        <LI> Interface with C and Java improved
        <LI> Debugger improved (skip command works fine now)
	</UL>

<LI> November, 1998. Version 3.1
	<UL>
        <LI> Bi-dirctional interface with C
        <LI> Bi-directional interface with Java
        <LI> Command history and editor
        <LI> re-implement primitives for I/O streams
	</UL>

<LI> May, 1998. Version 3.0:
	<UL>
        <LI> Bug fix in constraint interpreter and performance improvement.
	</UL>

<LI> Mar. 1997. Version 2.1: 
	<UL>
	<LI> Delaying and CLP(FD) constraint compiler implemented. 
	</UL>

<LI> Mar. 1996. Version 2.0: 
	<UL>
	<LI> Performance improved; bugs in if-then-else fixed; renamed to B-Prolog.  
	</UL>

<LI> Aug. 1995. Version 1.6: 
	<UL>
	<LI> Performance (especially that of the interpreter) improved; 
	<LI> the C interface improved.
	</UL>


<LI> Mar. 1995. Version 1.5: 
	<UL>
	<LI> Performance improved; Some file-manipulating builtin-ins in 
	<LI> ISO added. 
	</UL>

<LI> Aug. 1994. Version 1.2: 
	<UL>
	<LI> Performance improved; differences between interpreter and 
	<LI> compiler fixed. 
	</UL>

<LI> Mar. 1994, Version 1.0: 
	<UL>
	<LI> Released under the name Beta-Prolog. 
	</UL>
</UL>
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